| commit | db26217e6f54647b137a0fe1f2ab346de67d6f3e | |
| author | Will Deacon <will.deacon@arm.com> | |
| Fri, 29 May 2015 13:44:06 +0000 (29 14:44 +0100) | ||
| committer | Will Deacon <will.deacon@arm.com> | |
| Mon, 27 Jul 2015 14:28:54 +0000 (27 15:28 +0100) | ||
| tree | 5c839d3429de197f511161be339bcdacb786d471 | treesnapshot (tar.gz zip) |
| parent | 6059a7b6e818023436a9058170a4fea1c670dc98 | commitdiff |
arm64: atomic64_dec_if_positive: fix incorrect branch condition
If we attempt to atomic64_dec_if_positive on INT_MIN, we will underflow
and incorrectly decide that the original parameter was positive.
This patches fixes the broken condition code so that we handle this
corner case correctly.
Reviewed-by: Steve Capper <steve.capper@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
If we attempt to atomic64_dec_if_positive on INT_MIN, we will underflow
and incorrectly decide that the original parameter was positive.
This patches fixes the broken condition code so that we handle this
corner case correctly.
Reviewed-by: Steve Capper <steve.capper@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| arch/arm64/include/asm/atomic_ll_sc.h | diffblobblamehistory | |
| arch/arm64/include/asm/atomic_lse.h | diffblobblamehistory |