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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-05-29 07:33:59 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-05-30 10:01:11 +0200 |
| commit | 491af9903b858ee7c36735dc31708fe4074ce56f (patch) | |
| tree | 3617b5b496f610bffe9142ba07f6395bfe513497 | |
| parent | 2e30db9522837e2a5d30ce1e66afb0a7ee0ff350 (diff) | |
| download | linux-491af9903b858ee7c36735dc31708fe4074ce56f.tar.bz2 | |
s390/uaccess: fix access_ok compile warnings
On s390 access_ok is a macro which discards all parameters and always
returns 1. This can result in compile warnings which warn about unused
variables like this:
fs/read_write.c: In function 'rw_copy_check_uvector':
fs/read_write.c:684:16: warning: unused variable 'buf' [-Wunused-variable]
Fix this by adding a __range_ok() function which consumes all parameters
but still always returns 1.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/uaccess.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h index 8e83da66df0d..1f3a79bcd262 100644 --- a/arch/s390/include/asm/uaccess.h +++ b/arch/s390/include/asm/uaccess.h @@ -50,10 +50,15 @@ #define segment_eq(a,b) ((a).ar4 == (b).ar4) -#define __access_ok(addr, size) \ -({ \ - __chk_user_ptr(addr); \ - 1; \ +static inline int __range_ok(unsigned long addr, unsigned long size) +{ + return 1; +} + +#define __access_ok(addr, size) \ +({ \ + __chk_user_ptr(addr); \ + __range_ok((unsigned long)(addr), (size)); \ }) #define access_ok(type, addr, size) __access_ok(addr, size) |