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xtensa: properly fix missing compiler barrier in simcall 

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov 2012-10-22 08:42:39 +04:00 committed by Chris Zankel
parent 382cb5b917
commit 288dc2b68c
1 changed files with 1 additions and 6 deletions
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7
arch/xtensa/platforms/iss/include/platform/simcall.h
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@ -74,13 +74,12 @@ static inline int __simc(int a, int b, int c, int d, int e, int f)
"mov %1, a3\n"
: "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
: "r"(c1), "r"(d1), "r"(e1), "r"(f1)
: );
: "memory");
return ret;
}
static inline int simc_open(const char *file, int flags, int mode)
{
wmb();
return __simc(SYS_open, (int) file, flags, mode, 0, 0);
}
@ -91,19 +90,16 @@ static inline int simc_close(int fd)
static inline int simc_ioctl(int fd, int request, void *arg)
{
wmb();
return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0);
}
static inline int simc_read(int fd, void *buf, size_t count)
{
rmb();
return __simc(SYS_read, fd, (int) buf, count, 0, 0);
}
static inline int simc_write(int fd, const void *buf, size_t count)
{
wmb();
return __simc(SYS_write, fd, (int) buf, count, 0, 0);
}
@ -111,7 +107,6 @@ static inline int simc_poll(int fd)
{
struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
wmb();
return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,
0, 0);
}