arm64: initialize pgprot info earlier in boot

Presently, paging_init() calls init_mem_pgprot() to initialize pgprot
values used by macros such as PAGE_KERNEL, PAGE_KERNEL_EXEC, etc.

The new fixmap and early_ioremap support also needs to use these macros
before paging_init() is called.  This patch moves the init_mem_pgprot()
call out of paging_init() and into setup_arch() so that pgprot_default
gets initialized in time for fixmap and early_ioremap.

Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h
index 2494fc01896a2f0dba01f57cd87e3bd0877ab8b9..f600d400c07d2cb7e615a13bbe9d02fe3959714d 100644 (file)
--- a/arch/arm64/include/asm/mmu.h
+++ b/arch/arm64/include/asm/mmu.h
@@ -27,5 +27,6 @@ typedef struct {
 extern void paging_init(void);
 extern void setup_mm_for_reboot(void);
 extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
+extern void init_mem_pgprot(void);
 
 #endif

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 67da30741a1b64a73ce085739209d7bf085ac2e9..20830d1afbb6abcdbd3acb184ae37290460e56fe 100644 (file)
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -360,6 +360,8 @@ void __init setup_arch(char **cmdline_p)
 
        *cmdline_p = boot_command_line;
 
+       init_mem_pgprot();
+
        parse_early_param();
 
        arm64_memblock_init();

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index f8dc7e8fce6fea147a9842824a8046822b70b180..ba259a0e385ebad9bfcadb050f8ba4c8c6420f43 100644 (file)
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -125,7 +125,7 @@ early_param("cachepolicy", early_cachepolicy);
 /*
  * Adjust the PMD section entries according to the CPU in use.
  */
-static void __init init_mem_pgprot(void)
+void __init init_mem_pgprot(void)
 {
        pteval_t default_pgprot;
        int i;
@@ -357,7 +357,6 @@ void __init paging_init(void)
 {
        void *zero_page;
 
-       init_mem_pgprot();
        map_mem();
 
        /*