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ARC: futex cosmetics

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Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Michel Lespinasse <walken@google.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2015-08-05 19:23:34 +05:30
parent 31d30c8208
commit ed574e2bbd
1 changed files with 9 additions and 8 deletions
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17
arch/arc/include/asm/futex.h
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@ -94,6 +94,7 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
__futex_atomic_op("mov %0, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
/* oldval = *uaddr; *uaddr += oparg ; ret = *uaddr */
__futex_atomic_op("add %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
@ -142,12 +143,12 @@ static inline int futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
* cmpxchg of futex (pagefaults disabled by caller)
*/
static inline int
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval,
u32 newval)
futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 expval,
u32 newval)
{
u32 val;
u32 existval;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
return -EFAULT;
smp_mb();
@ -173,14 +174,14 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval,
" .word 1b, 4b \n"
" .word 2b, 4b \n"
" .previous\n"
: "=&r"(val)
: "r"(oldval), "r"(newval), "r"(uaddr), "ir"(-EFAULT)
: "=&r"(existval)
: "r"(expval), "r"(newval), "r"(uaddr), "ir"(-EFAULT)
: "cc", "memory");
smp_mb();
*uval = val;
return val;
*uval = existval;
return existval;
}
#endif