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| author | Rob Herring <rob.herring@calxeda.com> | 2013-11-07 10:34:46 -0600 |
|---|---|---|
| committer | Rob Herring <rob.herring@calxeda.com> | 2013-11-07 10:34:46 -0600 |
| commit | b5480950c6cbb7b07ab1c1a5af0dc661a1cb6f24 (patch) | |
| tree | b5fcb00387a838beb2bcf2f8ed2fd3d6d460c8ae /arch/arc/include | |
| parent | e363bbac316ffb5daaf45d855f82680148cafe20 (diff) | |
| parent | 355e62f5ad12b005c862838156262eb2df2f8dff (diff) | |
Merge remote-tracking branch 'grant/devicetree/next' into for-next
Diffstat (limited to 'arch/arc/include')
| -rw-r--r-- | arch/arc/include/asm/spinlock.h | 9 | ||||
| -rw-r--r-- | arch/arc/include/asm/uaccess.h | 4 |
2 files changed, 10 insertions, 3 deletions
diff --git a/arch/arc/include/asm/spinlock.h b/arch/arc/include/asm/spinlock.h index f158197ac5b..b6a8c2dfbe6 100644 --- a/arch/arc/include/asm/spinlock.h +++ b/arch/arc/include/asm/spinlock.h @@ -45,7 +45,14 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock) static inline void arch_spin_unlock(arch_spinlock_t *lock) { - lock->slock = __ARCH_SPIN_LOCK_UNLOCKED__; + unsigned int tmp = __ARCH_SPIN_LOCK_UNLOCKED__; + + __asm__ __volatile__( + " ex %0, [%1] \n" + : "+r" (tmp) + : "r"(&(lock->slock)) + : "memory"); + smp_mb(); } diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h index 32420824375..30c9baffa96 100644 --- a/arch/arc/include/asm/uaccess.h +++ b/arch/arc/include/asm/uaccess.h @@ -43,7 +43,7 @@ * Because it essentially checks if buffer end is within limit and @len is * non-ngeative, which implies that buffer start will be within limit too. * - * The reason for rewriting being, for majorit yof cases, @len is generally + * The reason for rewriting being, for majority of cases, @len is generally * compile time constant, causing first sub-expression to be compile time * subsumed. * @@ -53,7 +53,7 @@ * */ #define __user_ok(addr, sz) (((sz) <= TASK_SIZE) && \ - (((addr)+(sz)) <= get_fs())) + ((addr) <= (get_fs() - (sz)))) #define __access_ok(addr, sz) (unlikely(__kernel_ok) || \ likely(__user_ok((addr), (sz)))) |