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| author | root <root@artemis.panaceas.org> | 2015-12-25 15:00:15 +0000 |
|---|---|---|
| committer | root <root@artemis.panaceas.org> | 2015-12-25 15:00:15 +0000 |
| commit | ddd86436f4e3643c04b797f858dab95d5f2e4de9 (patch) | |
| tree | bfe7a780cf9a2f4fc33aec32c82e625e79dece1f /compat/compat_atomic.c | |
| download | backports-3.10.19-1-master.tar.gz backports-3.10.19-1-master.tar.bz2 backports-3.10.19-1-master.zip | |
Diffstat (limited to 'compat/compat_atomic.c')
| -rw-r--r-- | compat/compat_atomic.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/compat/compat_atomic.c b/compat/compat_atomic.c new file mode 100644 index 0000000..b8565aa --- /dev/null +++ b/compat/compat_atomic.c @@ -0,0 +1,33 @@ +#include <linux/spinlock.h> +#include <linux/module.h> + +#if !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)) && (defined(CONFIG_UML) || defined(CONFIG_X86))) && !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) && defined(CONFIG_ARM) && !defined(CONFIG_GENERIC_ATOMIC64)) + +static DEFINE_SPINLOCK(lock); + +long long atomic64_read(const atomic64_t *v) +{ + unsigned long flags; + long long val; + + spin_lock_irqsave(&lock, flags); + val = v->counter; + spin_unlock_irqrestore(&lock, flags); + return val; +} +EXPORT_SYMBOL_GPL(atomic64_read); + +long long atomic64_add_return(long long a, atomic64_t *v) +{ + unsigned long flags; + long long val; + + spin_lock_irqsave(&lock, flags); + val = v->counter += a; + spin_unlock_irqrestore(&lock, flags); + return val; +} +EXPORT_SYMBOL_GPL(atomic64_add_return); + +#endif + |