GitHub/exynos8895/android_kernel_samsung_universal8895.git
18 years ago[SPARC]: Clean up idprom header files.
David S. Miller [Fri, 10 Feb 2006 04:45:26 +0000 (20:45 -0800)]
[SPARC]: Clean up idprom header files.

Delete unused macros, and use fixed sized types in
sparc32 header.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: SUN4V memory exception trap handlers.
David S. Miller [Fri, 10 Feb 2006 04:20:34 +0000 (20:20 -0800)]
[SPARC64]: SUN4V memory exception trap handlers.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Hypervisor TSB context switching.
David S. Miller [Fri, 10 Feb 2006 01:21:53 +0000 (17:21 -0800)]
[SPARC64]: Hypervisor TSB context switching.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Implement sun4v TSB miss handlers.
David S. Miller [Fri, 10 Feb 2006 00:12:22 +0000 (16:12 -0800)]
[SPARC64]: Implement sun4v TSB miss handlers.

When we register a TSB with the hypervisor, so that it or hardware can
handle TLB misses and do the TSB walk for us, the hypervisor traps
down to these trap when it incurs a TSB miss.

Processing is simple, we load the missing virtual address and context,
and do a full page table walk.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: kernel/cpu.c needs asm/spitfire.h
David S. Miller [Thu, 9 Feb 2006 11:00:00 +0000 (03:00 -0800)]
[SPARC64]: kernel/cpu.c needs asm/spitfire.h

For 'tlb_type'.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Print ARCH as SUN4V when tlb_type is hypervisor.
David S. Miller [Thu, 9 Feb 2006 10:54:54 +0000 (02:54 -0800)]
[SPARC64]: Print ARCH as SUN4V when tlb_type is hypervisor.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Detect sun4v early in boot process.
David S. Miller [Thu, 9 Feb 2006 10:52:44 +0000 (02:52 -0800)]
[SPARC64]: Detect sun4v early in boot process.

We look for "SUNW,sun4v" in the 'compatible' property
of the root OBP device tree node.

Protect every %ver register access, to make sure it is
not touched on sun4v, as %ver is hyperprivileged there.

Lock kernel TLB entries using hypervisor calls instead of
calls into OBP.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sun4v cross-call sending support.
David S. Miller [Thu, 9 Feb 2006 00:41:20 +0000 (16:41 -0800)]
[SPARC64]: Sun4v cross-call sending support.

Technically the hypervisor call supports sending in a list
of all cpus to get the cross-call, but I only pass in one
cpu at a time for now.

The multi-cpu support is there, just ifdef'd out so it's easy to
enable or delete it later.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sun4v interrupt handling.
David S. Miller [Wed, 8 Feb 2006 10:53:50 +0000 (02:53 -0800)]
[SPARC64]: Sun4v interrupt handling.

Sun4v has 4 interrupt queues: cpu, device, resumable errors,
and non-resumable errors.  A set of head/tail offset pointers
help maintain a work queue in physical memory.  The entries
are 64-bytes in size.

Each queue is allocated then registered with the hypervisor
as we bring cpus up.

The two error queues each get a kernel side buffer that we
use to quickly empty the main interrupt queue before we
call up to C code to log the event and possibly take evasive
action.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Allocate and register the 4 sun4v mondo queues at bootup.
David S. Miller [Wed, 8 Feb 2006 08:08:23 +0000 (00:08 -0800)]
[SPARC64]: Allocate and register the 4 sun4v mondo queues at bootup.

Needs to occur before we enable PSTATE_IE in %pstate.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Verify all trap_per_cpu assembler offsets in trap_init()
David S. Miller [Wed, 8 Feb 2006 07:51:49 +0000 (23:51 -0800)]
[SPARC64]: Verify all trap_per_cpu assembler offsets in trap_init()

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add sun4v mondo queue bases to struct trap_per_cpu.
David S. Miller [Wed, 8 Feb 2006 06:53:56 +0000 (22:53 -0800)]
[SPARC64]: Add sun4v mondo queue bases to struct trap_per_cpu.

Also, correct TRAP_PER_CPU_FAULT_INFO define, it should be
0x40 not 0x20.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fix some comment typos in asm/hypervisor.h
David S. Miller [Wed, 8 Feb 2006 06:49:38 +0000 (22:49 -0800)]
[SPARC64]: Fix some comment typos in asm/hypervisor.h

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Patch up mmu context register writes for sun4v.
David S. Miller [Wed, 8 Feb 2006 06:13:05 +0000 (22:13 -0800)]
[SPARC64]: Patch up mmu context register writes for sun4v.

sun4v uses ASI_MMU instead of ASI_DMMU

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Register per-cpu fault status area with sun4v hypervisor.
David S. Miller [Wed, 8 Feb 2006 05:51:08 +0000 (21:51 -0800)]
[SPARC64]: Register per-cpu fault status area with sun4v hypervisor.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: asm/cpudata.h needs asm/asi.h
David S. Miller [Wed, 8 Feb 2006 05:15:41 +0000 (21:15 -0800)]
[SPARC64]: asm/cpudata.h needs asm/asi.h

For the expansion of __GET_CPUID() on SMP.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Niagara copy/clear page.
David S. Miller [Wed, 8 Feb 2006 00:09:12 +0000 (16:09 -0800)]
[SPARC64]: Niagara copy/clear page.

Happily we have no D-cache aliasing issues on these
chips, so the implementation is very straightforward.

Add a stub in bootup which will be where the patching
calls will be made for niagara/sun4v/hypervisor.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Rename gl_{1,2}insn_patch --> sun4v_{1,2}insn_patch
David S. Miller [Tue, 7 Feb 2006 08:00:16 +0000 (00:00 -0800)]
[SPARC64]: Rename gl_{1,2}insn_patch --> sun4v_{1,2}insn_patch

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Initial sun4v TLB miss handling infrastructure.
David S. Miller [Tue, 7 Feb 2006 07:44:37 +0000 (23:44 -0800)]
[SPARC64]: Initial sun4v TLB miss handling infrastructure.

Things are a little tricky because, unlike sun4u, we have
to:

1) do a hypervisor trap to do the TLB load.
2) do the TSB lookup calculations by hand

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add missing memory barriers to instruction patching functions.
David S. Miller [Mon, 6 Feb 2006 23:52:05 +0000 (15:52 -0800)]
[SPARC64]: Add missing memory barriers to instruction patching functions.

V9 requires a write memory barrier before the instruction flush.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sanitize %pstate writes for sun4v.
David S. Miller [Mon, 6 Feb 2006 06:27:28 +0000 (22:27 -0800)]
[SPARC64]: Sanitize %pstate writes for sun4v.

If we're just switching between different alternate global
sets, nop it out on sun4v.  Also, get rid of all of the
alternate global save/restore in the OBP CIF trampoline code.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill all %pstate changes in context switch code.
David S. Miller [Mon, 6 Feb 2006 05:59:03 +0000 (21:59 -0800)]
[SPARC64]: Kill all %pstate changes in context switch code.

They are totally unnecessary because:

1) Interrupts are already disabled when switch_to()
   runs.

2) We don't use hard-coded alternate globals any longer.

This found a case in rtrap, which still assumed alternate
global %g6 was current_thread_info(), and that is fixed
by this changeset as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.
David S. Miller [Mon, 6 Feb 2006 05:29:28 +0000 (21:29 -0800)]
[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.

Instead of setting/clearing PSTATE_AG we have to change
the %gl register value on sun4v.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fill dead cycles on trap entry with real work.
David S. Miller [Mon, 6 Feb 2006 04:47:26 +0000 (20:47 -0800)]
[SPARC64]: Fill dead cycles on trap entry with real work.

As we save trap state onto the stack, the store buffer fills up
mid-way through and we stall for several cycles as the store buffer
trickles out to the L2 cache.  Meanwhile we can do some privileged
register reads and other calculations, essentially for free.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add define for "GL" field of sun4v %tstate register.
David S. Miller [Sun, 5 Feb 2006 07:59:38 +0000 (23:59 -0800)]
[SPARC64]: Add define for "GL" field of sun4v %tstate register.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add sun4v case to __GET_CPUID() patch tables.
David S. Miller [Sat, 4 Feb 2006 23:40:53 +0000 (15:40 -0800)]
[SPARC64]: Add sun4v case to __GET_CPUID() patch tables.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sun4v interrupt queue register definitions.
David S. Miller [Sat, 4 Feb 2006 11:12:14 +0000 (03:12 -0800)]
[SPARC64]: Sun4v interrupt queue register definitions.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sun4v scratchpad register layout.
David S. Miller [Sat, 4 Feb 2006 11:12:02 +0000 (03:12 -0800)]
[SPARC64]: Sun4v scratchpad register layout.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Sun4v specific ASI defines.
David S. Miller [Sat, 4 Feb 2006 11:11:50 +0000 (03:11 -0800)]
[SPARC64]: Sun4v specific ASI defines.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Niagara optimized memcpy() and copy_{to,from}_user().
David S. Miller [Mon, 6 Mar 2006 00:41:56 +0000 (16:41 -0800)]
[SPARC64]: Niagara optimized memcpy() and copy_{to,from}_user().

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add Niagara init-store twin-load ASI defines.
David S. Miller [Sat, 4 Feb 2006 11:11:17 +0000 (03:11 -0800)]
[SPARC64]: Add Niagara init-store twin-load ASI defines.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add some hypervisor tlb_type checks.
David S. Miller [Sat, 4 Feb 2006 11:10:53 +0000 (03:10 -0800)]
[SPARC64]: Add some hypervisor tlb_type checks.

And more consistently check cheetah{,_plus} instead
of assuming anything not spitfire is cheetah{,_plus}.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add 'hypervisor' to ultra_tlb_type enumeration.
David S. Miller [Sat, 4 Feb 2006 11:09:03 +0000 (03:09 -0800)]
[SPARC64]: Add 'hypervisor' to ultra_tlb_type enumeration.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: SUN4V hypervisor TLB flush support code.
David S. Miller [Sat, 4 Feb 2006 11:08:37 +0000 (03:08 -0800)]
[SPARC64]: SUN4V hypervisor TLB flush support code.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: SUN4V hypervisor interface defines.
David S. Miller [Sat, 4 Feb 2006 11:01:45 +0000 (03:01 -0800)]
[SPARC64]: SUN4V hypervisor interface defines.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Refine register window trap handling.
David S. Miller [Sat, 4 Feb 2006 08:10:01 +0000 (00:10 -0800)]
[SPARC64]: Refine register window trap handling.

When saving and restoing trap state, do the window spill/fill
handling inline so that we never trap deeper than 2 trap levels.
This is important for chips like Niagara.

The window fixup code is massively simplified, and many more
improvements are now possible.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add explicit register args to trap state loading macros.
David S. Miller [Fri, 3 Feb 2006 05:55:10 +0000 (21:55 -0800)]
[SPARC64]: Add explicit register args to trap state loading macros.

This, as well as making the code cleaner, allows a simplification in
the TSB miss handling path.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Refine code sequences to get the cpu id.
David S. Miller [Mon, 27 Feb 2006 07:27:19 +0000 (23:27 -0800)]
[SPARC64]: Refine code sequences to get the cpu id.

On uniprocessor, it's always zero for optimize that.

On SMP, the jmpl to the stub kills the return address stack in the cpu
branch prediction logic, so expand the code sequence inline and use a
code patching section to fix things up.  This also always better and
explicit register selection, which will be taken advantage of in a
future changeset.

The hard_smp_processor_id() function is big, so do not inline it.

Fix up tests for Jalapeno to also test for Serrano chips too.  These
tests want "jbus Ultra-IIIi" cases to match, so that is what we should
test for.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Turn off TSB growing for now.
David S. Miller [Fri, 3 Feb 2006 00:16:24 +0000 (16:16 -0800)]
[SPARC64]: Turn off TSB growing for now.

There are several tricky races involved with growing the TSB.  So just
use base-size TSBs for user contexts and we can revisit enabling this
later.

One part of the SMP problems is that tsb_context_switch() can see
partially updated TSB configuration state if tsb_grow() is running in
parallel.  That's easily solved with a seqlock taken as a writer by
tsb_grow() and taken as a reader to capture all the TSB config state
in tsb_context_switch().

Then there is flush_tsb_user() running in parallel with a tsb_grow().
In theory we could take the seqlock as a reader there too, and just
resample the TSB pointer and reflush but that looks really ugly.

Lastly, I believe there is a case with threads that results in a TSB
entry lock bit being set spuriously which will cause the next access
to that TSB entry to wedge the cpu (since the TSB entry lock bit will
never clear).  It's either copy_tsb() or some bug elsewhere in the TSB
assembly.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Correctable ECC errors cannot occur at trap level > 0.
David S. Miller [Thu, 2 Feb 2006 09:20:18 +0000 (01:20 -0800)]
[SPARC64]: Correctable ECC errors cannot occur at trap level > 0.

The are distrupting, which by the sparc v9 definition means they
can only occur when interrupts are enabled in the %pstate register.
This never occurs in any of the trap handling code running at
trap levels > 0.

So just mark it as an unexpected trap.

This allows us to kill off the cee_stuff member of struct thread_info.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Access TSB with physical addresses when possible.
David S. Miller [Wed, 1 Feb 2006 23:55:21 +0000 (15:55 -0800)]
[SPARC64]: Access TSB with physical addresses when possible.

This way we don't need to lock the TSB into the TLB.
The trick is that every TSB load/store is registered into
a special instruction patch section.  The default uses
virtual addresses, and the patch instructions use physical
address load/stores.

We can't do this on all chips because only cheetah+ and later
have the physical variant of the atomic quad load.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill out-of-date commentary in asm-sparc64/tsb.h
David S. Miller [Wed, 1 Feb 2006 07:13:29 +0000 (23:13 -0800)]
[SPARC64]: Kill out-of-date commentary in asm-sparc64/tsb.h

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Don't clobber alt-global %g4 on window fixups.
David S. Miller [Wed, 1 Feb 2006 02:35:05 +0000 (18:35 -0800)]
[SPARC64]: Don't clobber alt-global %g4 on window fixups.

If we are returning back to kernel mode, %g4 could be live
(for example, in the case where we window spill in the etrap
code).  So do not change it's value if going back to kernel.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fix race in LOAD_PER_CPU_BASE()
David S. Miller [Wed, 1 Feb 2006 02:34:51 +0000 (18:34 -0800)]
[SPARC64]: Fix race in LOAD_PER_CPU_BASE()

Since we use %g5 itself as a temporary, it can get clobbered
if we take an interrupt mid-stream and thus cause end up with
the final %g5 value too early as a result of rtrap processing.

Set %g5 at the very end, atomically, to avoid this problem.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill swapper_pgd_zero, totally unused.
David S. Miller [Wed, 1 Feb 2006 02:34:34 +0000 (18:34 -0800)]
[SPARC64]: Kill swapper_pgd_zero, totally unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fix too early reference to %g6
David S. Miller [Wed, 1 Feb 2006 02:34:21 +0000 (18:34 -0800)]
[SPARC64]: Fix too early reference to %g6

%g6 is not necessarily set to current_thread_info()
at sparc64_realfault_common.  So store the fault
code and address after we invoke etrap and %g6 is
properly set up.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill hard-coded %pstate setting in sparc_exit.
David S. Miller [Wed, 1 Feb 2006 02:34:06 +0000 (18:34 -0800)]
[SPARC64]: Kill hard-coded %pstate setting in sparc_exit.

Just flip the bit off of whatever it's currently set to.
PSTATE_IE is guarenteed to be enabled when we get here.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Increase swapper_tsb size to 32K.
David S. Miller [Wed, 1 Feb 2006 02:33:49 +0000 (18:33 -0800)]
[SPARC64]: Increase swapper_tsb size to 32K.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill sole argument passed to setup_tba().
David S. Miller [Wed, 1 Feb 2006 02:33:37 +0000 (18:33 -0800)]
[SPARC64]: Kill sole argument passed to setup_tba().

No longer used, and move extern declaration to a header file.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill PROM locked TLB entry preservation code.
David S. Miller [Wed, 1 Feb 2006 02:33:25 +0000 (18:33 -0800)]
[SPARC64]: Kill PROM locked TLB entry preservation code.

It is totally unnecessary complexity.  After we take over
the trap table, we handle all PROM tlb misses fully.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Use sparc64_highest_unlocked_tlb_ent in __tsb_context_switch()
David S. Miller [Wed, 1 Feb 2006 02:33:12 +0000 (18:33 -0800)]
[SPARC64]: Use sparc64_highest_unlocked_tlb_ent in __tsb_context_switch()

Instead of ugly hard-coded value.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fix bogus flush instruction usage.
David S. Miller [Wed, 1 Feb 2006 02:33:00 +0000 (18:33 -0800)]
[SPARC64]: Fix bogus flush instruction usage.

Some of the trap code was still assuming that alternate
global %g6 was hard coded with current_thread_info().
Let's just consistently flush at KERNBASE when we need
a pipeline synchronization.  That's locked into the TLB
and will always work.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Fix incorrect TSB lock bit handling.
David S. Miller [Wed, 1 Feb 2006 02:32:44 +0000 (18:32 -0800)]
[SPARC64]: Fix incorrect TSB lock bit handling.

The TSB_LOCK_BIT define is actually a special
value shifted down by 32-bits for the assembler
code macros.

In C code, this isn't what we want.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill {save,restore}_alternate_globals()
David S. Miller [Wed, 1 Feb 2006 02:32:29 +0000 (18:32 -0800)]
[SPARC64]: Kill {save,restore}_alternate_globals()

No longer needed now that we no longer have hard-coded
alternate global register usage.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Preload TSB entries from update_mmu_cache().
David S. Miller [Wed, 1 Feb 2006 02:32:04 +0000 (18:32 -0800)]
[SPARC64]: Preload TSB entries from update_mmu_cache().

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Dynamically grow TSB in response to RSS growth.
David S. Miller [Wed, 1 Feb 2006 02:31:38 +0000 (18:31 -0800)]
[SPARC64]: Dynamically grow TSB in response to RSS growth.

As the RSS grows, grow the TSB in order to reduce the likelyhood
of hash collisions and thus poor hit rates in the TSB.

This definitely needs some serious tuning.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Add infrastructure for dynamic TSB sizing.
David S. Miller [Wed, 1 Feb 2006 02:31:20 +0000 (18:31 -0800)]
[SPARC64]: Add infrastructure for dynamic TSB sizing.

This also cleans up tsb_context_switch().  The assembler
routine is now __tsb_context_switch() and the former is
an inline function that picks out the bits from the mm_struct
and passes it into the assembler code as arguments.

setup_tsb_parms() computes the locked TLB entry to map the
TSB.  Later when we support using the physical address quad
load instructions of Cheetah+ and later, we'll simply use
the physical address for the TSB register value and set
the map virtual and PTE both to zero.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: TSB refinements.
David S. Miller [Wed, 1 Feb 2006 02:31:06 +0000 (18:31 -0800)]
[SPARC64]: TSB refinements.

Move {init_new,destroy}_context() out of line.

Do not put huge pages into the TSB, only base page size translations.
There are some clever things we could do here, but for now let's be
correct instead of fancy.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Elminate all usage of hard-coded trap globals.
David S. Miller [Mon, 27 Feb 2006 07:24:22 +0000 (23:24 -0800)]
[SPARC64]: Elminate all usage of hard-coded trap globals.

UltraSPARC has special sets of global registers which are switched to
for certain trap types.  There is one set for MMU related traps, one
set of Interrupt Vector processing, and another set (called the
Alternate globals) for all other trap types.

For what seems like forever we've hard coded the values in some of
these trap registers.  Some examples include:

1) Interrupt Vector global %g6 holds current processors interrupt
   work struct where received interrupts are managed for IRQ handler
   dispatch.

2) MMU global %g7 holds the base of the page tables of the currently
   active address space.

3) Alternate global %g6 held the current_thread_info() value.

Such hardcoding has resulted in some serious issues in many areas.
There are some code sequences where having another register available
would help clean up the implementation.  Taking traps such as
cross-calls from the OBP firmware requires some trick code sequences
wherein we have to save away and restore all of the special sets of
global registers when we enter/exit OBP.

We were also using the IMMU TSB register on SMP to hold the per-cpu
area base address, which doesn't work any longer now that we actually
use the TSB facility of the cpu.

The implementation is pretty straight forward.  One tricky bit is
getting the current processor ID as that is different on different cpu
variants.  We use a stub with a fancy calling convention which we
patch at boot time.  The calling convention is that the stub is
branched to and the (PC - 4) to return to is in register %g1.  The cpu
number is left in %g6.  This stub can be invoked by using the
__GET_CPUID macro.

We use an array of per-cpu trap state to store the current thread and
physical address of the current address space's page tables.  The
TRAP_LOAD_THREAD_REG loads %g6 with the current thread from this
table, it uses __GET_CPUID and also clobbers %g1.

TRAP_LOAD_IRQ_WORK is used by the interrupt vector processing to load
the current processor's IRQ software state into %g6.  It also uses
__GET_CPUID and clobbers %g1.

Finally, TRAP_LOAD_PGD_PHYS loads the physical address base of the
current address space's page tables into %g7, it clobbers %g1 and uses
__GET_CPUID.

Many refinements are possible, as well as some tuning, with this stuff
in place.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Kill pgtable quicklists and use SLAB.
David S. Miller [Wed, 1 Feb 2006 02:30:27 +0000 (18:30 -0800)]
[SPARC64]: Kill pgtable quicklists and use SLAB.

Taking a nod from the powerpc port.

With the per-cpu caching of both the page allocator and SLAB, the
pgtable quicklist scheme becomes relatively silly and primitive.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: No need to D-cache color page tables any longer.
David S. Miller [Wed, 1 Feb 2006 02:30:13 +0000 (18:30 -0800)]
[SPARC64]: No need to D-cache color page tables any longer.

Unlike the virtual page tables, the new TSB scheme does not
require this ugly hack.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: Move away from virtual page tables, part 1.
David S. Miller [Wed, 1 Feb 2006 02:29:18 +0000 (18:29 -0800)]
[SPARC64]: Move away from virtual page tables, part 1.

We now use the TSB hardware assist features of the UltraSPARC
MMUs.

SMP is currently knowingly broken, we need to find another place
to store the per-cpu base pointers.  We hid them away in the TSB
base register, and that obviously will not work any more :-)

Another known broken case is non-8KB base page size.

Also noticed that flush_tlb_all() is not referenced anywhere, only
the internal __flush_tlb_all() (local cpu only) is used by the
sparc64 port, so we can get rid of flush_tlb_all().

The kernel gets it's own 8KB TSB (swapper_tsb) and each address space
gets it's own private 8K TSB.  Later we can add code to dynamically
increase the size of per-process TSB as the RSS grows.  An 8KB TSB is
good enough for up to about a 4MB RSS, after which the TSB starts to
incur many capacity and conflict misses.

We even accumulate OBP translations into the kernel TSB.

Another area for refinement is large page size support.  We could use
a secondary address space TSB to handle those.

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC]: BUG_ON() Conversion in arch/sparc/kernel/ioport.c
Eric Sesterhenn [Fri, 10 Mar 2006 10:55:20 +0000 (02:55 -0800)]
[SPARC]: BUG_ON() Conversion in arch/sparc/kernel/ioport.c

this changes if() BUG(); constructs to BUG_ON() which is
cleaner and can better optimized away

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[SPARC64]: fix sparc_floppy_irq's auxio_register reseting
Bernhard R Link [Fri, 10 Mar 2006 09:23:13 +0000 (01:23 -0800)]
[SPARC64]: fix sparc_floppy_irq's auxio_register reseting

The patch "[SPARC64]: Get rid of fast IRQ feature"
moved the the code from arch/sparc64/kernel/entry.S:
      lduba           [%g7] ASI_PHYS_BYPASS_EC_E, %g5
      or              %g5, AUXIO_AUX1_FTCNT, %g5
      stba            %g5, [%g7] ASI_PHYS_BYPASS_EC_E
      andn            %g5, AUXIO_AUX1_FTCNT, %g5
      stba            %g5, [%g7] ASI_PHYS_BYPASS_EC_E
to arch/sparc64/kernel/irq.c:
              val = readb(auxio_register);
              val |= AUXIO_AUX1_FTCNT;
              writeb(val, auxio_register);
              val &= AUXIO_AUX1_FTCNT;
              writeb(val, auxio_register);
This looks like it it missing a bitwise not, which is reintroduced
by this patch.

Due to lack of a floppy device, I could not test it, but it looks
evident.

Signed-off-by: Bernhard R Link <brlink@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 years agoLinux 2.6.16
Linus Torvalds [Mon, 20 Mar 2006 05:53:29 +0000 (21:53 -0800)]
Linux 2.6.16

18 years ago[PATCH] Remove obsolete CREDITS address
Andrea Arcangeli [Sun, 19 Mar 2006 18:04:17 +0000 (19:04 +0100)]
[PATCH] Remove obsolete CREDITS address

This address is going to be obsolete, so I should update it.

18 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Mon, 20 Mar 2006 05:12:00 +0000 (21:12 -0800)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] SB1: Check for -mno-sched-prolog if building corelis debug kernel.
  [MIPS] Sibyte: Fix race in sb1250_gettimeoffset().
  [MIPS] Sibyte: Fix interrupt timer off by one bug.
  [MIPS] Sibyte: Fix M_SCD_TIMER_INIT and M_SCD_TIMER_CNT wrong field width.
  [MIPS] Protect more of timer_interrupt() by xtime_lock.
  [MIPS] Work around bad code generation for <asm/io.h>.
  [MIPS] Simple patch to power off DBAU1200
  [MIPS] Fix DBAu1550 software power off.
  [MIPS] local_r4k_flush_cache_page fix
  [MIPS] SB1: Fix interrupt disable hazard.
  [MIPS] Get rid of the IP22-specific code in arclib.
  Update MAINTAINERS entry for MIPS.

18 years ago[TG3]: 40-bit DMA workaround part 2
Michael Chan [Sun, 19 Mar 2006 21:21:12 +0000 (13:21 -0800)]
[TG3]: 40-bit DMA workaround part 2

The 40-bit DMA workaround recently implemented for 5714, 5715, and
5780 needs to be expanded because there may be other tg3 devices
behind the EPB Express to PCIX bridge in the 5780 class device.

For example, some 4-port card or mother board designs have 5704 behind
the 5714.

All devices behind the EPB require the 40-bit DMA workaround.

Thanks to Chris Elmquist again for reporting the problem and testing
the patch.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[AX.25]: Fix potencial memory hole.
Ralf Baechle DL5RB [Sun, 19 Mar 2006 21:20:06 +0000 (13:20 -0800)]
[AX.25]: Fix potencial memory hole.

If the AX.25 dialect chosen by the sysadmin is set to DAMA master / 3
(or DAMA slave / 2, if CONFIG_AX25_DAMA_SLAVE=n) ax25_kick() will fall
through the switch statement without calling ax25_send_iframe() or any
other function that would eventually free skbn thus leaking the packet.

Fix by restricting the sysctl inferface to allow only actually supported
AX.25 dialects.

The system administration mistake needed for this to happen is rather
unlikely, so this is an uncritical hole.

Coverity #651.

Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[PATCH] Kconfig: swap VIDEO_CX88_ALSA and VIDEO_CX88_DVB
Michael Krufky [Wed, 15 Mar 2006 05:36:13 +0000 (02:36 -0300)]
[PATCH] Kconfig: swap VIDEO_CX88_ALSA and VIDEO_CX88_DVB

VIDEO_CX88_ALSA should not be between VIDEO_CX88_DVB and
VIDEO_CX88_DVB_ALL_FRONTENDS

When cx88-alsa was added to cx88/Kconfig, it was added in between
VIDEO_CX88_DVB and VIDEO_CX88_DVB_ALL_FRONTENDS.  This caused
undesireable effects to the appearance of the menu options in
menuconfig.

This fix reorders cx88-alsa and cx88-dvb in Kconfig, to match saa7134,
and restore the correct menuconfig appearance.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] Fixed em28xx based system lockup
Markus Rechberger [Tue, 7 Feb 2006 10:49:13 +0000 (08:49 -0200)]
[PATCH] Fixed em28xx based system lockup

Fixed em28xx based system lockup, device needs to be initialized before
starting the isoc transfer otherwise the system will completly lock up.

Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] disable unshare(CLONE_VM) for now
Oleg Nesterov [Sat, 18 Mar 2006 17:41:10 +0000 (20:41 +0300)]
[PATCH] disable unshare(CLONE_VM) for now

sys_unshare() does mmput(new_mm).  This is not enough if we have
mm->core_waiters.

This patch is a temporary fix for soon to be released 2.6.16.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
[ Checked with Uli: "I'm not planning to use unshare(CLONE_VM).  It's
  not needed for any functionality planned so far.  What we (as in Red
  Hat) need unshare() for now is the filesystem side." ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[MIPS] SB1: Check for -mno-sched-prolog if building corelis debug kernel.
Ralf Baechle [Sat, 18 Mar 2006 16:59:31 +0000 (16:59 +0000)]
[MIPS] SB1: Check for -mno-sched-prolog if building corelis debug kernel.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Sibyte: Fix race in sb1250_gettimeoffset().
Ralf Baechle [Wed, 15 Mar 2006 00:03:29 +0000 (00:03 +0000)]
[MIPS] Sibyte: Fix race in sb1250_gettimeoffset().

From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:

sb1250_gettimeoffset() simply reads the current cpu 0 timer remaining
value, however once this counter reaches 0 and the interrupt is raised,
it immediately resets and begins to count down again.

If sb1250_gettimeoffset() is called on cpu 1 via do_gettimeofday() after
the timer has reset but prior to cpu 0 processing the interrupt and
taking write_seqlock() in timer_interrupt() it will return a full value
(or close to it) causing time to jump backwards 1ms. Once cpu 0 handles
the interrupt and timer_interrupt() gets far enough along it will jump
forward 1ms.

Fix this problem by implementing mips_hpt_*() on sb1250 using a spare
timer unrelated to the existing periodic interrupt timers. It runs at
1Mhz with a full 23bit counter.  This eliminated the custom
do_gettimeoffset() for sb1250 and allowed use of the generic
fixed_rate_gettimeoffset() using mips_hpt_*() and timerhi/timerlo.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Sibyte: Fix interrupt timer off by one bug.
Ralf Baechle [Tue, 14 Mar 2006 23:52:47 +0000 (23:52 +0000)]
[MIPS] Sibyte: Fix interrupt timer off by one bug.

From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:

The timers need to be loaded with 1 less than the desired interval not
the interval itself.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Sibyte: Fix M_SCD_TIMER_INIT and M_SCD_TIMER_CNT wrong field width.
Ralf Baechle [Tue, 14 Mar 2006 23:47:35 +0000 (23:47 +0000)]
[MIPS] Sibyte: Fix M_SCD_TIMER_INIT and M_SCD_TIMER_CNT wrong field width.

From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:

Field width should be 23 bits not 20 bits.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Protect more of timer_interrupt() by xtime_lock.
Ralf Baechle [Tue, 14 Mar 2006 23:46:58 +0000 (23:46 +0000)]
[MIPS] Protect more of timer_interrupt() by xtime_lock.

From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:

* do_timer() expects the arch-specific handler to take the lock as it
  modifies jiffies[_64] and xtime.
* writing timerhi/lo in timer_interrupt() will mess up
  fixed_rate_gettimeoffset() which reads timerhi/lo.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Work around bad code generation for <asm/io.h>.
Ralf Baechle [Wed, 15 Mar 2006 11:36:31 +0000 (11:36 +0000)]
[MIPS] Work around bad code generation for <asm/io.h>.

If a call to set_io_port_base() was being followed by usage of
mips_io_port_base in the same function gcc was possibly using the old
value due to some clever abuse of const.  Adding a barrier will keep
the optimization and result in correct code with latest gcc.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Simple patch to power off DBAU1200
Matej Kupljen [Wed, 30 Nov 2005 09:20:01 +0000 (10:20 +0100)]
[MIPS] Simple patch to power off DBAU1200

Signed-off-by: Matej Kupljen <matej.kupljen@ultra.si>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Fix DBAu1550 software power off.
Sergei Shtylylov [Tue, 14 Mar 2006 04:20:00 +0000 (07:20 +0300)]
[MIPS] Fix DBAu1550 software power off.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] local_r4k_flush_cache_page fix
Atsushi Nemoto [Mon, 13 Mar 2006 09:23:03 +0000 (18:23 +0900)]
[MIPS] local_r4k_flush_cache_page fix

If dcache_size != icache_size or dcache_size != scache_size, or
set-associative cache, icache/scache does not flushed properly.  Make
blast_?cache_page_indexed() masks its index value correctly.  Also,
use physical address for physically indexed pcache/scache.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] SB1: Fix interrupt disable hazard.
Ralf Baechle [Mon, 13 Mar 2006 16:16:29 +0000 (16:16 +0000)]
[MIPS] SB1: Fix interrupt disable hazard.

The SB1 core has a three cycle interrupt disable hazard but we were
wrongly treating it as fully interlocked.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[MIPS] Get rid of the IP22-specific code in arclib.
Ralf Baechle [Fri, 10 Mar 2006 19:47:17 +0000 (19:47 +0000)]
[MIPS] Get rid of the IP22-specific code in arclib.

This breaks the kernel build if sgiwd93 was configured as a module.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years agoUpdate MAINTAINERS entry for MIPS.
Ralf Baechle [Fri, 10 Mar 2006 13:47:21 +0000 (13:47 +0000)]
Update MAINTAINERS entry for MIPS.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
18 years ago[NET]: Fix race condition in sk_wait_event().
Alexey Kuznetsov [Sat, 18 Mar 2006 00:05:43 +0000 (16:05 -0800)]
[NET]: Fix race condition in sk_wait_event().

It is broken, the condition is checked out of socket lock. It is
wonderful the bug survived for so long time.

[ This fixes bugzilla #6233:
  race condition in tcp_sendmsg when connection became established ]

Signed-off-by: David S. Miller <davem@davemloft.net>
18 years ago[PATCH] fix free swap cache latency
Hugh Dickins [Fri, 17 Mar 2006 07:04:09 +0000 (23:04 -0800)]
[PATCH] fix free swap cache latency

Lee Revell reported 28ms latency when process with lots of swapped memory
exits.

2.6.15 introduced a latency regression when unmapping: in accounting the
zap_work latency breaker, pte_none counted 1, pte_present PAGE_SIZE, but a
swap entry counted nothing at all.  We think of pages present as the slow
case, but Lee's trace shows that free_swap_and_cache's radix tree lookup
can make a lot of work - and we could have been doing it many thousands of
times without a latency break.

Move the zap_work update up to account swap entries like pages present.
This does account non-linear pte_file entries, and unmap_mapping_range
skipping over swap entries, by the same amount even though they're quick:
but neither of those cases deserves complicating the code (and they're
treated no worse than they were in 2.6.14).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] kbuild: fix buffer overflow in modpost
Sam Ravnborg [Fri, 17 Mar 2006 07:04:08 +0000 (23:04 -0800)]
[PATCH] kbuild: fix buffer overflow in modpost

Jiri Benc <jbenc@suse.cz> reported that modpost would stop with SIGABRT if
used with long filepaths.
The error looked like:
>   Building modules, stage 2.
>   MODPOST
> *** glibc detected *** scripts/mod/modpost: realloc(): invalid next size:
+0x0809f588 ***
> [...]

Fix this by allocating at least the required memory + SZ bytes each time.
Before we sometimes ended up allocating too little memory resuting in the
glibc detected bug above.  Based on patch originally submitted by: Jiri
Benc <jbenc@suse.cz>

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] nfsservctl(): remove user-triggerable printk
Peter Staubach [Fri, 17 Mar 2006 07:04:02 +0000 (23:04 -0800)]
[PATCH] nfsservctl(): remove user-triggerable printk

A user can use nfsservctl() to spam the logs.

This can happen because the arguments to the nfsservctl() system call are
versioned.  This is a good thing.  However, when a bad version is detected,
the kernel prints a message and then returns an error.

Signed-off-by: Peter Staubach <staubach@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] fix race in pagevec_strip?
Christoph Lameter [Fri, 17 Mar 2006 07:04:07 +0000 (23:04 -0800)]
[PATCH] fix race in pagevec_strip?

We can call try_to_release_page() with PagePrivate off and a valid
page->mapping This may cause all sorts of trouble for the filesystem
*_releasepage() handlers.  XFS bombs out in that case.

Lock the page before checking for page private.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] dm stripe: Fix bounds
Kevin Corry [Fri, 17 Mar 2006 07:04:03 +0000 (23:04 -0800)]
[PATCH] dm stripe: Fix bounds

The dm-stripe target currently does not enforce that the size of a stripe
device be a multiple of the chunk-size.  Under certain conditions, this can
lead to I/O requests going off the end of an underlying device.  This
test-case shows one example.

echo "0 100 linear /dev/hdb1 0" | dmsetup create linear0
echo "0 100 linear /dev/hdb1 100" | dmsetup create linear1
echo "0 200 striped 2 32 /dev/mapper/linear0 0 /dev/mapper/linear1 0" | \
   dmsetup create stripe0
dd if=/dev/zero of=/dev/mapper/stripe0 bs=1k

This will produce the output:
dd: writing '/dev/mapper/stripe0': Input/output error
97+0 records in
96+0 records out

And in the kernel log will be:
attempt to access beyond end of device
dm-0: rw=0, want=104, limit=100

The patch will check that the table size is a multiple of the stripe
chunk-size when the table is created, which will prevent the above striped
device from being created.

This should not affect tools like LVM or EVMS, since in all the cases I can
think of, striped devices are always created with the sizes being a
multiple of the chunk-size.

The size of a stripe device must be a multiple of its chunk-size.

(akpm: that typecast is quite gratuitous)

Signed-off-by: Kevin Corry <kevcorry@us.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] x86: check for online cpus before bringing them up
Srivatsa Vaddagiri [Fri, 17 Mar 2006 07:04:06 +0000 (23:04 -0800)]
[PATCH] x86: check for online cpus before bringing them up

Bryce reported a bug wherein offlining CPU0 (on x86 box) and then
subsequently onlining it resulted in a lockup.

On x86, CPU0 is never offlined.  The subsequent attempt to online CPU0
doesn't take that into account.  It actually tries to bootup the already
booted CPU.  Following patch fixes the problem (as acknowledged by Bryce).
Please consider for inclusion in 2.6.16.

Check if cpu is already online.

Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] v9fs: fix overzealous dropping of dentry which breaks dcache
Eric Van Hensbergen [Fri, 17 Mar 2006 07:04:04 +0000 (23:04 -0800)]
[PATCH] v9fs: fix overzealous dropping of dentry which breaks dcache

There is a d_drop in dir_release which caused problems as it invalidates
dcache entries too soon.  This was likely a part of the wierd cwd behavior
folks were seeing.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] posix-timers: fix requeue accounting when signal is ignored
Roman Zippel [Fri, 17 Mar 2006 07:04:01 +0000 (23:04 -0800)]
[PATCH] posix-timers: fix requeue accounting when signal is ignored

When the posix-timer signal is ignored then the timer is rearmed by the
callback function.  The requeue pending accounting has to be fixed up else
the state might be wrong.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] time_interpolator: add __read_mostly
Christoph Lameter [Fri, 17 Mar 2006 07:04:00 +0000 (23:04 -0800)]
[PATCH] time_interpolator: add __read_mostly

The pointer to the current time interpolator and the current list of time
interpolators are typically only changed during bootup.  Adding
__read_mostly takes them away from possibly hot cachelines.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] page migration: Fail with error if swap not setup
Christoph Lameter [Fri, 17 Mar 2006 07:03:59 +0000 (23:03 -0800)]
[PATCH] page migration: Fail with error if swap not setup

Currently the migration of anonymous pages will silently fail if no swap is
setup.  This patch makes page migration functions check for available swap
and fail with -ENODEV if no swap space is available.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[PATCH] unshare: Use rcu_assign_pointer when setting sighand
Eric W. Biederman [Thu, 16 Mar 2006 17:31:38 +0000 (10:31 -0700)]
[PATCH] unshare: Use rcu_assign_pointer when setting sighand

The sighand pointer only needs the rcu_read_lock on the
read side.  So only depending on task_lock protection
when setting this pointer is not enough.  We also need
a memory barrier to ensure the initialization is seen first.

Use rcu_assign_pointer as it does this for us, and clearly
documents that we are setting an rcu readable pointer.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
18 years ago[netdrvr] fix array overflows in Chelsio driver
Scott Bardone [Fri, 17 Mar 2006 00:20:40 +0000 (19:20 -0500)]
[netdrvr] fix array overflows in Chelsio driver

Adrian Bunk wrote:
> The Coverity checker spotted the following two array overflows in
> drivers/net/chelsio/sge.c (in both cases, the arrays contain 3
> elements):
[snip]

This is a bug. The array should contain 2 elements.  Here is the fix.

Signed-off-by: Scott Bardone <sbardone@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
18 years ago[PATCH] e1000 endianness bugs
David S. Miller [Wed, 15 Mar 2006 22:26:28 +0000 (14:26 -0800)]
[PATCH] e1000 endianness bugs

return -E_NO_BIG_ENDIAN_TESTING;

[E1000]: Fix 4 missed endianness conversions on RX descriptor fields.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
18 years agoMerge branch 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...
Jeff Garzik [Fri, 17 Mar 2006 00:16:59 +0000 (19:16 -0500)]
Merge branch 'upstream-fixes' of git://git./linux/kernel/git/linville/wireless-2.6

18 years agoMerge branch 'e100-fixes' of git://198.78.49.142/~jbrandeb/linux-2.6
Jeff Garzik [Fri, 17 Mar 2006 00:15:26 +0000 (19:15 -0500)]
Merge branch 'e100-fixes' of git://198.78.49.142/~jbrandeb/linux-2.6