diff options
| author | Will Deacon <will.deacon@arm.com> | 2012-01-20 12:01:13 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-03-24 10:38:51 +0100 |
| commit | f9d4861fc32b995b1616775614459b8f266c803c (patch) | |
| tree | 187d7bfa7ff0418f2762d38c9c553331e602faf1 /arch/arm/include/asm/page.h | |
| parent | ARM: move CP15 definitions to separate header file (diff) | |
| download | linux-f9d4861fc32b995b1616775614459b8f266c803c.tar.xz linux-f9d4861fc32b995b1616775614459b8f266c803c.zip | |
ARM: 7294/1: vectors: use gate_vma for vectors user mapping
The current user mapping for the vectors page is inserted as a `horrible
hack vma' into each task via arch_setup_additional_pages. This causes
problems with the MM subsystem and vm_normal_page, as described here:
https://lkml.org/lkml/2012/1/14/55
Following the suggestion from Hugh in the above thread, this patch uses
the gate_vma for the vectors user mapping, therefore consolidating
the horrible hack VMAs into one.
Acked-and-Tested-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/page.h')
| -rw-r--r-- | arch/arm/include/asm/page.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index 97b440c25c58..5838361c48b3 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -151,6 +151,8 @@ extern void __cpu_copy_user_highpage(struct page *to, struct page *from, #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) extern void copy_page(void *to, const void *from); +#define __HAVE_ARCH_GATE_AREA 1 + #ifdef CONFIG_ARM_LPAE #include <asm/pgtable-3level-types.h> #else |