diff options
author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-07-08 18:06:26 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-07-16 04:54:25 -0400 |
commit | 87b935a0ef9a1ddf62f2f0c0fc17b10654ff41cd (patch) | |
tree | 914e661143d76f9045e5f91331a19036d3597443 /arch/x86/kernel/process_64.c | |
parent | 8840c0ccd763936a8e730ece118197a51be8dc8e (diff) |
x86: clean up formatting of __switch_to
process_64.c:__switch_to has some very old strange formatting, some of
it dating back to pre-git. Fix it up.
No functional changes.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
-rw-r--r-- | arch/x86/kernel/process_64.c | 56 |
1 files changed, 28 insertions, 28 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index a8e53626ac9a..e8a8e1b99817 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c | |||
@@ -537,8 +537,8 @@ static inline void __switch_to_xtra(struct task_struct *prev_p, | |||
537 | struct task_struct * | 537 | struct task_struct * |
538 | __switch_to(struct task_struct *prev_p, struct task_struct *next_p) | 538 | __switch_to(struct task_struct *prev_p, struct task_struct *next_p) |
539 | { | 539 | { |
540 | struct thread_struct *prev = &prev_p->thread, | 540 | struct thread_struct *prev = &prev_p->thread; |
541 | *next = &next_p->thread; | 541 | struct thread_struct *next = &next_p->thread; |
542 | int cpu = smp_processor_id(); | 542 | int cpu = smp_processor_id(); |
543 | struct tss_struct *tss = &per_cpu(init_tss, cpu); | 543 | struct tss_struct *tss = &per_cpu(init_tss, cpu); |
544 | unsigned fsindex, gsindex; | 544 | unsigned fsindex, gsindex; |
@@ -586,35 +586,34 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) | |||
586 | 586 | ||
587 | /* | 587 | /* |
588 | * Switch FS and GS. | 588 | * Switch FS and GS. |
589 | * | ||
590 | * Segment register != 0 always requires a reload. Also | ||
591 | * reload when it has changed. When prev process used 64bit | ||
592 | * base always reload to avoid an information leak. | ||
589 | */ | 593 | */ |
590 | { | 594 | if (unlikely(fsindex | next->fsindex | prev->fs)) { |
591 | /* segment register != 0 always requires a reload. | 595 | loadsegment(fs, next->fsindex); |
592 | also reload when it has changed. | 596 | /* |
593 | when prev process used 64bit base always reload | 597 | * Check if the user used a selector != 0; if yes |
594 | to avoid an information leak. */ | 598 | * clear 64bit base, since overloaded base is always |
595 | if (unlikely(fsindex | next->fsindex | prev->fs)) { | 599 | * mapped to the Null selector |
596 | loadsegment(fs, next->fsindex); | 600 | */ |
597 | /* check if the user used a selector != 0 | 601 | if (fsindex) |
598 | * if yes clear 64bit base, since overloaded base | ||
599 | * is always mapped to the Null selector | ||
600 | */ | ||
601 | if (fsindex) | ||
602 | prev->fs = 0; | 602 | prev->fs = 0; |
603 | } | 603 | } |
604 | /* when next process has a 64bit base use it */ | 604 | /* when next process has a 64bit base use it */ |
605 | if (next->fs) | 605 | if (next->fs) |
606 | wrmsrl(MSR_FS_BASE, next->fs); | 606 | wrmsrl(MSR_FS_BASE, next->fs); |
607 | prev->fsindex = fsindex; | 607 | prev->fsindex = fsindex; |
608 | 608 | ||
609 | if (unlikely(gsindex | next->gsindex | prev->gs)) { | 609 | if (unlikely(gsindex | next->gsindex | prev->gs)) { |
610 | load_gs_index(next->gsindex); | 610 | load_gs_index(next->gsindex); |
611 | if (gsindex) | 611 | if (gsindex) |
612 | prev->gs = 0; | 612 | prev->gs = 0; |
613 | } | ||
614 | if (next->gs) | ||
615 | wrmsrl(MSR_KERNEL_GS_BASE, next->gs); | ||
616 | prev->gsindex = gsindex; | ||
617 | } | 613 | } |
614 | if (next->gs) | ||
615 | wrmsrl(MSR_KERNEL_GS_BASE, next->gs); | ||
616 | prev->gsindex = gsindex; | ||
618 | 617 | ||
619 | /* Must be after DS reload */ | 618 | /* Must be after DS reload */ |
620 | unlazy_fpu(prev_p); | 619 | unlazy_fpu(prev_p); |
@@ -627,7 +626,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) | |||
627 | write_pda(pcurrent, next_p); | 626 | write_pda(pcurrent, next_p); |
628 | 627 | ||
629 | write_pda(kernelstack, | 628 | write_pda(kernelstack, |
630 | (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET); | 629 | (unsigned long)task_stack_page(next_p) + |
630 | THREAD_SIZE - PDA_STACKOFFSET); | ||
631 | #ifdef CONFIG_CC_STACKPROTECTOR | 631 | #ifdef CONFIG_CC_STACKPROTECTOR |
632 | write_pda(stack_canary, next_p->stack_canary); | 632 | write_pda(stack_canary, next_p->stack_canary); |
633 | /* | 633 | /* |