2005-11-19 04:17:32 -05:00
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#ifndef __ASM_POWERPC_MMU_CONTEXT_H
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#define __ASM_POWERPC_MMU_CONTEXT_H
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2005-12-16 16:43:46 -05:00
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#ifdef __KERNEL__
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2005-11-19 04:17:32 -05:00
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#ifndef CONFIG_PPC64
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#include <asm-ppc/mmu_context.h>
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#else
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2005-04-16 18:20:36 -04:00
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#include <linux/kernel.h>
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#include <linux/mm.h>
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Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 17:22:52 -04:00
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#include <linux/sched.h>
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2005-04-16 18:20:36 -04:00
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#include <asm/mmu.h>
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#include <asm/cputable.h>
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2007-05-02 13:27:14 -04:00
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#include <asm-generic/mm_hooks.h>
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2005-04-16 18:20:36 -04:00
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/*
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* Copyright (C) 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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2005-11-06 19:06:55 -05:00
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static inline void enter_lazy_tlb(struct mm_struct *mm,
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struct task_struct *tsk)
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2005-04-16 18:20:36 -04:00
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{
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}
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2006-06-29 02:16:15 -04:00
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/*
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* The proto-VSID space has 2^35 - 1 segments available for user mappings.
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* Each segment contains 2^28 bytes. Each context maps 2^44 bytes,
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* so we can support 2^19-1 contexts (19 == 35 + 28 - 44).
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*/
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2005-04-16 18:20:36 -04:00
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#define NO_CONTEXT 0
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2006-06-29 02:16:15 -04:00
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#define MAX_CONTEXT ((1UL << 19) - 1)
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2005-04-16 18:20:36 -04:00
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extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
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extern void destroy_context(struct mm_struct *mm);
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extern void switch_stab(struct task_struct *tsk, struct mm_struct *mm);
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extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
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/*
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* switch_mm is the entry point called from the architecture independent
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* code in kernel/sched.c
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*/
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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if (!cpu_isset(smp_processor_id(), next->cpu_vm_mask))
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cpu_set(smp_processor_id(), next->cpu_vm_mask);
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/* No need to flush userspace segments if the mm doesnt change */
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if (prev == next)
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return;
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#ifdef CONFIG_ALTIVEC
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if (cpu_has_feature(CPU_FTR_ALTIVEC))
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asm volatile ("dssall");
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#endif /* CONFIG_ALTIVEC */
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if (cpu_has_feature(CPU_FTR_SLB))
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switch_slb(tsk, next);
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else
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switch_stab(tsk, next);
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}
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#define deactivate_mm(tsk,mm) do { } while (0)
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/*
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* After we have set current->mm to a new value, this activates
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* the context for the new mm so we see the new mappings.
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*/
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static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
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{
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unsigned long flags;
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local_irq_save(flags);
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switch_mm(prev, next, current);
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local_irq_restore(flags);
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}
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2005-11-19 04:17:32 -05:00
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#endif /* CONFIG_PPC64 */
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2005-12-16 16:43:46 -05:00
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#endif /* __KERNEL__ */
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2005-11-19 04:17:32 -05:00
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#endif /* __ASM_POWERPC_MMU_CONTEXT_H */
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