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Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (57 commits)
  x86, perf events: Check if we have APIC enabled
  perf_event: Fix variable initialization in other codepaths
  perf kmem: Fix unused argument build warning
  perf symbols: perf_header__read_build_ids() offset'n'size should be u64
  perf symbols: dsos__read_build_ids() should read both user and kernel buildids
  perf tools: Align long options which have no short forms
  perf kmem: Show usage if no option is specified
  sched: Mark sched_clock() as notrace
  perf sched: Add max delay time snapshot
  perf tools: Correct size given to memset
  perf_event: Fix perf_swevent_hrtimer() variable initialization
  perf sched: Fix for getting task's execution time
  tracing/kprobes: Fix field creation's bad error handling
  perf_event: Cleanup for cpu_clock_perf_event_update()
  perf_event: Allocate children's perf_event_ctxp at the right time
  perf_event: Clean up __perf_event_init_context()
  hw-breakpoints: Modify breakpoints without unregistering them
  perf probe: Update perf-probe document
  perf probe: Support --del option
  trace-kprobe: Support delete probe syntax
  ...
This commit is contained in:
Linus Torvalds
2009-12-11 20:47:30 -08:00
parent c4e194e3b7 125580380f
commit 6f696eb17b
40 changed files with 889 additions and 576 deletions
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33
arch/x86/kernel/dumpstack_64.c
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@@ -103,6 +103,35 @@ static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
return NULL;
}
static inline int
in_irq_stack(unsigned long *stack, unsigned long *irq_stack,
unsigned long *irq_stack_end)
{
return (stack >= irq_stack && stack < irq_stack_end);
}
/*
* We are returning from the irq stack and go to the previous one.
* If the previous stack is also in the irq stack, then bp in the first
* frame of the irq stack points to the previous, interrupted one.
* Otherwise we have another level of indirection: We first save
* the bp of the previous stack, then we switch the stack to the irq one
* and save a new bp that links to the previous one.
* (See save_args())
*/
static inline unsigned long
fixup_bp_irq_link(unsigned long bp, unsigned long *stack,
unsigned long *irq_stack, unsigned long *irq_stack_end)
{
#ifdef CONFIG_FRAME_POINTER
struct stack_frame *frame = (struct stack_frame *)bp;
if (!in_irq_stack(stack, irq_stack, irq_stack_end))
return (unsigned long)frame->next_frame;
#endif
return bp;
}
/*
* x86-64 can have up to three kernel stacks:
* process stack
@@ -175,7 +204,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
irq_stack = irq_stack_end -
(IRQ_STACK_SIZE - 64) / sizeof(*irq_stack);
if (stack >= irq_stack && stack < irq_stack_end) {
if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
if (ops->stack(data, "IRQ") < 0)
break;
bp = print_context_stack(tinfo, stack, bp,
@@ -186,6 +215,8 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
* pointer (index -1 to end) in the IRQ stack:
*/
stack = (unsigned long *) (irq_stack_end[-1]);
bp = fixup_bp_irq_link(bp, stack, irq_stack,
irq_stack_end);
irq_stack_end = NULL;
ops->stack(data, "EOI");
continue;