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| author |   Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-05-10 14:23:01 +0100 |
|---|---|---|
| committer | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-05-10 14:23:01 +0100 |
| commit | d2bab05ac1f9a2f5ddcd2f3256237e5c47fc127f (patch) | |
| tree | a330a8ac155d82bae9a500d28533888dedad4d1e /include | |
| parent | [PATCH] ARM: Add top_pmd, which points at the top-most page table (diff) | |
| download | linux-dev-d2bab05ac1f9a2f5ddcd2f3256237e5c47fc127f.tar.xz linux-dev-d2bab05ac1f9a2f5ddcd2f3256237e5c47fc127f.zip | |
[PATCH] ARM: Move copy/clear user_page locking into implementation
Move the locking for copy_user_page() and clear_user_page() into
the implementations which require locking. For simple memcpy/
memset based implementations, the locking is extra overhead which
is not necessary, and prevents preemption occuring.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-arm/page.h | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h index d26d1574d972..019c45d75730 100644 --- a/include/asm-arm/page.h +++ b/include/asm-arm/page.h @@ -114,19 +114,8 @@ extern void __cpu_copy_user_page(void *to, const void *from, unsigned long user); #endif -#define clear_user_page(addr,vaddr,pg) \ - do { \ - preempt_disable(); \ - __cpu_clear_user_page(addr, vaddr); \ - preempt_enable(); \ - } while (0) - -#define copy_user_page(to,from,vaddr,pg) \ - do { \ - preempt_disable(); \ - __cpu_copy_user_page(to, from, vaddr); \ - preempt_enable(); \ - } while (0) +#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) +#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) #define clear_page(page) memzero((void *)(page), PAGE_SIZE) extern void copy_page(void *to, const void *from); |