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sh: fix sys_cacheflush error checking 

sys_cacheflush should return with EINVAL if the cache parameter is not
one of ICACHE, DCACHE or BCACHE.
So, we need to include 0 in the first check.

It also adds the three definitions above as wrapper of the existent macros.

PS: ltp cacheflush01 test now passes.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Giuseppe Cavallaro 2009-08-24 18:59:09 +09:00 committed by Paul Mundt
parent ffad9d7a54
commit 788e6af37a
2 changed files with 8 additions and 1 deletions
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7
arch/sh/include/asm/cachectl.h
View File

@ -9,4 +9,11 @@
#define CACHEFLUSH_I 0x4
/*
* Options for cacheflush system call
*/
#define ICACHE CACHEFLUSH_I /* flush instruction cache */
#define DCACHE CACHEFLUSH_D_PURGE /* writeback and flush data cache */
#define BCACHE (ICACHE|DCACHE) /* flush both caches */
#endif /* _SH_CACHECTL_H */

2
arch/sh/kernel/sys_sh.c
View File

@ -186,7 +186,7 @@ asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
{
struct vm_area_struct *vma;
if ((op < 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
return -EINVAL;
/*