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m68k: implement __clear_user()

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m68k: implement __clear_user(), which is needed by fs/signalfd.c

Since we always let the MMU do all checking, clear_user() and __clear_user()
are identical. The old clear_user() is renamed to __clear_user() for
consistency.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven 2007-05-15 01:41:29 -07:00 committed by Linus Torvalds
parent 0fcdf96ca9
commit 3c46bdcaec
2 changed files with 5 additions and 3 deletions
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4
arch/m68k/lib/uaccess.c
View File

@ -181,7 +181,7 @@ EXPORT_SYMBOL(strnlen_user);
* Zero Userspace * Zero Userspace
*/ */
unsigned long clear_user(void __user *to, unsigned long n) unsigned long __clear_user(void __user *to, unsigned long n)
{ {
unsigned long res; unsigned long res;
@ -219,4 +219,4 @@ unsigned long clear_user(void __user *to, unsigned long n)
return res; return res;
} }
EXPORT_SYMBOL(clear_user); EXPORT_SYMBOL(__clear_user);

4
include/asm-m68k/uaccess.h
View File

@ -361,7 +361,9 @@ __constant_copy_to_user(void __user *to, const void *from, unsigned long n)
long strncpy_from_user(char *dst, const char __user *src, long count); long strncpy_from_user(char *dst, const char __user *src, long count);
long strnlen_user(const char __user *src, long n); long strnlen_user(const char __user *src, long n);
unsigned long clear_user(void __user *to, unsigned long n); unsigned long __clear_user(void __user *to, unsigned long n);
#define clear_user __clear_user
#define strlen_user(str) strnlen_user(str, 32767) #define strlen_user(str) strnlen_user(str, 32767)