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openrisc: Define __ro_after_init to avoid crash
author
Guenter Roeck
<linux@roeck-us.net>
Sat, 24 Sep 2016 14:15:02 +0000
(07:15 -0700)
committer
Guenter Roeck
<linux@roeck-us.net>
Sun, 6 Nov 2016 16:01:12 +0000
(08:01 -0800)
openrisc qemu tests fail with the following crash.
Unable to handle kernel access at virtual address 0xc0300c34
Oops#: 0001
CPU #: 0
PC:
c016c710
SR:
0000ae67
SP:
c1017e04
GPR00:
00000000
GPR01:
c1017e04
GPR02:
c0300c34
GPR03:
c0300c34
GPR04:
00000000
GPR05:
c0300cb0
GPR06:
c0300c34
GPR07:
000000ff
GPR08:
c107f074
GPR09:
c0199ef4
GPR10:
c1016000
GPR11:
00000000
GPR12:
00000000
GPR13:
c107f044
GPR14:
c0473774
GPR15:
07ce0000
GPR16:
00000000
GPR17:
c107ed8a
GPR18:
00009600
GPR19:
c107f044
GPR20:
c107ee74
GPR21:
00000003
GPR22:
c0473770
GPR23:
00000033
GPR24:
000000bf
GPR25:
00000019
GPR26:
c046400c
GPR27:
00000001
GPR28:
c0464028
GPR29:
c1018000
GPR30:
00000006
GPR31:
ccf37483
RES:
00000000
oGPR11:
ffffffff
Process swapper (pid: 1, stackpage=
c1001960
)
Stack: Stack dump [0xc1017cf8]:
sp + 00: 0xc1017e04
sp + 04: 0xc0300c34
sp + 08: 0xc0300c34
sp + 12: 0x00000000
...
Bisect points to commit
d2ec3f77de8e
("pty: make ptmx file ops read-only
after init"). Fix by defining __ro_after_init for the openrisc
architecture, similar to parisc.
Fixes:
d2ec3f77de8e
("pty: make ptmx file ops read-only after init")
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Stafford Horne <shorne@gmail.com>
arch/openrisc/include/asm/cache.h
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diff --git
a/arch/openrisc/include/asm/cache.h
b/arch/openrisc/include/asm/cache.h
index 4ce7a01a252dc6a2c191917e2516a5ffe27aa1d1..5f55da9cbfd5ce8ff72d9baea51671bcedd44732 100644
(file)
--- a/
arch/openrisc/include/asm/cache.h
+++ b/
arch/openrisc/include/asm/cache.h
@@
-23,6
+23,8
@@
* they shouldn't be hard-coded!
*/
+#define __ro_after_init __read_mostly
+
#define L1_CACHE_BYTES 16
#define L1_CACHE_SHIFT 4