55ccf3fe3f
Historical prepare_to_copy() is mostly a no-op, duplicated for majority of the architectures and the rest following the x86 model of flushing the extended register state like fpu there. Remove it and use the arch_dup_task_struct() instead. Suggested-by: Oleg Nesterov <oleg@redhat.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Link: http://lkml.kernel.org/r/1336692811-30576-1-git-send-email-suresh.b.siddha@intel.com Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <chris@zankel.net> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
|
|
* include/asm-alpha/processor.h
|
|
*
|
|
* Copyright (C) 1994 Linus Torvalds
|
|
*/
|
|
|
|
#ifndef __ASM_ALPHA_PROCESSOR_H
|
|
#define __ASM_ALPHA_PROCESSOR_H
|
|
|
|
#include <linux/personality.h> /* for ADDR_LIMIT_32BIT */
|
|
|
|
/*
|
|
* Returns current instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() \
|
|
({ void *__pc; __asm__ ("br %0,.+4" : "=r"(__pc)); __pc; })
|
|
|
|
/*
|
|
* We have a 42-bit user address space: 4TB user VM...
|
|
*/
|
|
#define TASK_SIZE (0x40000000000UL)
|
|
|
|
#define STACK_TOP \
|
|
(current->personality & ADDR_LIMIT_32BIT ? 0x80000000 : 0x00120000000UL)
|
|
|
|
#define STACK_TOP_MAX 0x00120000000UL
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE \
|
|
((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2)
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
/* This is dead. Everything has been moved to thread_info. */
|
|
struct thread_struct { };
|
|
#define INIT_THREAD { }
|
|
|
|
/* Return saved PC of a blocked thread. */
|
|
struct task_struct;
|
|
extern unsigned long thread_saved_pc(struct task_struct *);
|
|
|
|
/* Do necessary setup to start up a newly executed thread. */
|
|
extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
|
|
|
|
/* Free all resources held by a thread. */
|
|
extern void release_thread(struct task_struct *);
|
|
|
|
/* Create a kernel thread without removing it from tasklists. */
|
|
extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
|
|
|
|
#define KSTK_ESP(tsk) \
|
|
((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
|
|
|
|
#define cpu_relax() barrier()
|
|
|
|
#define ARCH_HAS_PREFETCH
|
|
#define ARCH_HAS_PREFETCHW
|
|
#define ARCH_HAS_SPINLOCK_PREFETCH
|
|
|
|
#ifndef CONFIG_SMP
|
|
/* Nothing to prefetch. */
|
|
#define spin_lock_prefetch(lock) do { } while (0)
|
|
#endif
|
|
|
|
extern inline void prefetch(const void *ptr)
|
|
{
|
|
__builtin_prefetch(ptr, 0, 3);
|
|
}
|
|
|
|
extern inline void prefetchw(const void *ptr)
|
|
{
|
|
__builtin_prefetch(ptr, 1, 3);
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
extern inline void spin_lock_prefetch(const void *ptr)
|
|
{
|
|
__builtin_prefetch(ptr, 1, 3);
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ASM_ALPHA_PROCESSOR_H */
|