From mboxrd@z Thu Jan 1 00:00:00 1970 From: icoolidge@google.com (Ian Coolidge) Date: Wed, 28 Oct 2015 17:47:45 -0700 Subject: [PATCH] arm64: spinlock: const qualify read-only functions In-Reply-To: <1446079665-25366-1-git-send-email-icoolidge@google.com> References: <1446079665-25366-1-git-send-email-icoolidge@google.com> Message-ID: <1446079665-25366-2-git-send-email-icoolidge@google.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This allows assert_spin_locked() to be used against spinlocks that are const qualified. Signed-off-by: Ian Coolidge --- arch/arm64/include/asm/spinlock.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h index c85e96d..72a7f33 100644 --- a/arch/arm64/include/asm/spinlock.h +++ b/arch/arm64/include/asm/spinlock.h @@ -122,17 +122,17 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock) : "memory"); } -static inline int arch_spin_value_unlocked(arch_spinlock_t lock) +static inline int arch_spin_value_unlocked(const arch_spinlock_t lock) { return lock.owner == lock.next; } -static inline int arch_spin_is_locked(arch_spinlock_t *lock) +static inline int arch_spin_is_locked(const arch_spinlock_t *lock) { return !arch_spin_value_unlocked(READ_ONCE(*lock)); } -static inline int arch_spin_is_contended(arch_spinlock_t *lock) +static inline int arch_spin_is_contended(const arch_spinlock_t *lock) { arch_spinlock_t lockval = READ_ONCE(*lock); return (lockval.next - lockval.owner) > 1; -- 2.6.0.rc2.230.g3dd15c0