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| author | Will Deacon <will.deacon@arm.com> | 2012-08-21 15:33:19 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2013-08-20 11:54:54 +0100 |
| commit | d9524dc32cab52714dee0c8e59c7437ee33a239a (patch) | |
| tree | 09c0171cdc043daae67b6cbfc3a25e30bf53a4cc | |
| parent | 28256d612726a28a8b9d3c49f2b74198c4423d6a (diff) | |
| download | blackbird-op-linux-d9524dc32cab52714dee0c8e59c7437ee33a239a.tar.gz blackbird-op-linux-d9524dc32cab52714dee0c8e59c7437ee33a239a.zip | |
ARM: cacheflush: don't round address range up to nearest page
The flush_cache_user_range macro takes a pair of addresses describing
the start and end of the virtual address range to flush. Due to an
accidental oversight when flush_cache_range_user was introduced, the
address range was rounded up so that the start and end addresses were
page-aligned.
For historical reference, the interesting commits in history.git are:
10eacf1775e1 ("[ARM] Clean up ARM cache handling interfaces (part 1)")
71432e79b76b ("[ARM] Add flush_cache_user_page() for sys_cacheflush()")
This patch removes the alignment code, reducing the amount of flushing
required for ranges that are not an exact multiple of PAGE_SIZE.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm/include/asm/cacheflush.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h index 17d0ae8672fa..bfd37e58f855 100644 --- a/arch/arm/include/asm/cacheflush.h +++ b/arch/arm/include/asm/cacheflush.h @@ -268,8 +268,7 @@ extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr * Harvard caches are synchronised for the user space address range. * This is used for the ARM private sys_cacheflush system call. */ -#define flush_cache_user_range(start,end) \ - __cpuc_coherent_user_range((start) & PAGE_MASK, PAGE_ALIGN(end)) +#define flush_cache_user_range(s,e) __cpuc_coherent_user_range(s,e) /* * Perform necessary cache operations to ensure that data previously |
