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sh: unwinder: Convert frame allocations to GFP_ATOMIC. 

save_stack_trace_tsk() and friends can be called from atomic context (as
triggered by latencytop), and subsequently hit two problematic allocation
points that were using GFP_KERNEL (these were dwarf_unwind_stack() and
dwarf_frame_alloc_regs()). Convert these over to GFP_ATOMIC and get
latencytop working with the DWARF unwinder.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-08-14 23:58:37 +09:00
parent 718dbf376a
commit 0fc11e3618
1 changed files with 2 additions and 2 deletions
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4
arch/sh/kernel/dwarf.c
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@ -57,7 +57,7 @@ static void dwarf_frame_alloc_regs(struct dwarf_frame *frame,
if (frame->num_regs >= num_regs)
return;
regs = kzalloc(new_size, GFP_KERNEL);
regs = kzalloc(new_size, GFP_ATOMIC);
if (!regs) {
printk(KERN_WARNING "Unable to allocate DWARF registers\n");
/*
@ -531,7 +531,7 @@ struct dwarf_frame *dwarf_unwind_stack(unsigned long pc,
define_ra = true;
}
frame = kzalloc(sizeof(*frame), GFP_KERNEL);
frame = kzalloc(sizeof(*frame), GFP_ATOMIC);
if (!frame)
return NULL;