mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 06:57:57 +00:00
88 lines
2.1 KiB
Diff
88 lines
2.1 KiB
Diff
--- 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 */
|