Merge branch 'linus' into stackprotector

Conflicts:
	arch/x86/include/asm/pda.h
	kernel/fork.c

1 files changed, 35 insertions, 0 deletions

diff --git a/arch/um/include/asm/system.h b/arch/um/include/asm/system.h
new file mode 100644
index 00000000000..ae5f94d6317
--- /dev/null
+++ b/arch/um/include/asm/system.h
@@ -0,0 +1,35 @@
+#ifndef __UM_SYSTEM_GENERIC_H
+#define __UM_SYSTEM_GENERIC_H
+
+#include "sysdep/system.h"
+
+extern void *switch_to(void *prev, void *next, void *last);
+
+extern int get_signals(void);
+extern int set_signals(int enable);
+extern int get_signals(void);
+extern void block_signals(void);
+extern void unblock_signals(void);
+
+#define raw_local_save_flags(flags) do { typecheck(unsigned long, flags); \
+				     (flags) = get_signals(); } while(0)
+#define raw_local_irq_restore(flags) do { typecheck(unsigned long, flags); \
+				      set_signals(flags); } while(0)
+
+#define raw_local_irq_save(flags) do { raw_local_save_flags(flags); \
+                                   raw_local_irq_disable(); } while(0)
+
+#define raw_local_irq_enable() unblock_signals()
+#define raw_local_irq_disable() block_signals()
+
+#define irqs_disabled()                 \
+({                                      \
+        unsigned long flags;            \
+        raw_local_save_flags(flags);        \
+        (flags == 0);                   \
+})
+
+extern void *_switch_to(void *prev, void *next, void *last);
+#define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
+
+#endif