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linux-next/arch/x86/include/asm/current.h

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x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-23 13:26:29 +08:00
#ifndef _ASM_X86_CURRENT_H
#define _ASM_X86_CURRENT_H
x86: unify current.h Simply stitch these together. There are just two definitions that are shared but the file is resonably small and putting these things together shows that further unifications requires a unification of the per cpu / pda handling between both arches. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-10 10:09:48 +08:00
#include <linux/compiler.h>
#include <asm/percpu.h>
x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2009-01-18 23:38:58 +08:00
#ifndef __ASSEMBLY__
x86: unify current.h Simply stitch these together. There are just two definitions that are shared but the file is resonably small and putting these things together shows that further unifications requires a unification of the per cpu / pda handling between both arches. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-10 10:09:48 +08:00
struct task_struct;
DECLARE_PER_CPU(struct task_struct *, current_task);
static __always_inline struct task_struct *get_current(void)
{
x86, percpu: Add 'percpu_read_stable()' interface for cacheable accesses This is very useful for some common things like 'get_current()' and 'get_thread_info()', which can be used multiple times in a function, and where the result is cacheable. tj: Added the magical undocumented "P" modifier to UP __percpu_arg() to force gcc to dereference the pointer value passed in via the "p" input constraint. Without this, percpu_read_stable() returns the address of the percpu variable. Also added comment explaining the difference between percpu_read() and percpu_read_stable(). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-08-03 13:08:48 +08:00
return percpu_read_stable(current_task);
x86: unify current.h Simply stitch these together. There are just two definitions that are shared but the file is resonably small and putting these things together shows that further unifications requires a unification of the per cpu / pda handling between both arches. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-10 10:09:48 +08:00
}
x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2009-01-18 23:38:58 +08:00
#define current get_current()
x86: unify current.h Simply stitch these together. There are just two definitions that are shared but the file is resonably small and putting these things together shows that further unifications requires a unification of the per cpu / pda handling between both arches. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-10 10:09:48 +08:00
#endif /* __ASSEMBLY__ */
x86: Fix ASM_X86__ header guards Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-23 13:26:29 +08:00
#endif /* _ASM_X86_CURRENT_H */
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