[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>

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);