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| author | Felix Fietkau <nbd@openwrt.org> | 2011-07-09 09:01:17 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2011-07-09 09:01:17 +0000 |
| commit | 97248baa3e2511d8e6c5ec56d4f85194efe59e38 (patch) | |
| tree | 0f54a973b005e8c4bd1ddda188afb87a30dc7ff8 | |
| parent | 7bab9b2f30ac50a036d34599a01bbe5187247841 (diff) | |
| download | upstream-97248baa3e2511d8e6c5ec56d4f85194efe59e38.tar.gz upstream-97248baa3e2511d8e6c5ec56d4f85194efe59e38.tar.bz2 upstream-97248baa3e2511d8e6c5ec56d4f85194efe59e38.zip | |
mac80211: backport atomic64_t support for kernels that don't support it
SVN-Revision: 27572
| -rw-r--r-- | package/mac80211/patches/022-atomic64_backport.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/package/mac80211/patches/022-atomic64_backport.patch b/package/mac80211/patches/022-atomic64_backport.patch new file mode 100644 index 0000000000..27e2edb711 --- /dev/null +++ b/package/mac80211/patches/022-atomic64_backport.patch @@ -0,0 +1,87 @@ +--- a/compat/Makefile ++++ b/compat/Makefile +@@ -34,3 +34,8 @@ compat-$(CONFIG_COMPAT_KERNEL_2_6_39) += + compat-2.6.39.o \ + kstrtox.o + ++ifndef CONFIG_64BIT ++ifndef CONFIG_GENERIC_ATOMIC64 ++ compat-y += compat_atomic.o ++endif ++endif +--- a/include/linux/compat-2.6.31.h ++++ b/include/linux/compat-2.6.31.h +@@ -199,6 +199,20 @@ void compat_synchronize_threaded_irq(str + #define list_entry_rcu(ptr, type, member) \ + container_of(rcu_dereference(ptr), type, member) + ++#ifndef CONFIG_64BIT ++ ++typedef struct { ++ long long counter; ++} atomic64_t; ++ ++extern long long atomic64_read(const atomic64_t *v); ++extern long long atomic64_add_return(long long a, atomic64_t *v); ++ ++#define atomic64_inc_return(v) atomic64_add_return(1LL, (v)) ++ ++#endif ++ ++ + #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)) */ + + #endif /* LINUX_26_31_COMPAT_H */ +--- /dev/null ++++ b/compat/compat_atomic.c +@@ -0,0 +1,29 @@ ++#include <linux/spinlock.h> ++#include <linux/module.h> ++ ++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(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(atomic64_add_return); ++ +--- a/include/linux/compat-3.1.h ++++ b/include/linux/compat-3.1.h +@@ -24,6 +24,18 @@ + + #define genl_dump_check_consistent(...) do {} while(0) + ++/* ++ * In many versions, several architectures do not seem to include an ++ * atomic64_t implementation, and do not include the software emulation from ++ * asm-generic/atomic64_t. ++ * Detect and handle this here. ++ */ ++#include <asm/atomic.h> ++ ++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)) && !defined(ATOMIC64_INIT) ++#include <asm-generic/atomic64.h> ++#endif ++ + #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,1,0)) */ + + #endif /* LINUX_3_1_COMPAT_H */ |