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authorHelge Deller <deller@gmx.de>2008-12-17 23:57:34 +0100
committerKyle McMartin <kyle@mcmartin.ca>2009-01-05 18:15:25 +0000
commite0e7ed4811ce32d48ca8ee9fd136357d093243a9 (patch)
tree78c8f476190a93e8319989855ac3fd81ff40bd7f /arch/parisc/kernel/unwind.c
parent0063507787ee7b385a8cbe7521469acf33341eb6 (diff)
downloadleg-kernel-e0e7ed4811ce32d48ca8ee9fd136357d093243a9.tar.gz
parisc: fix GFP_KERNEL use while atomic in unwinder
Since unwind_frame_init_from_blocked_task() may be called from interrupt/in_atomic context, it needs to kmalloc() memory with GFP_ATOMIC instead of GFP_KERNEL. This fixes this warning (ShowTasks called from sysrq handler): BUG: sleeping function called from invalid context at mm/slab.c:3044 in_atomic(): 1, irqs_disabled(): 1, pid: 2119, name: miniruby Backtrace: [<10132e78>] __might_sleep+0x4c/0x118 [<1018f644>] kmem_cache_alloc+0x2c/0xb4 [<1011bae0>] unwind_frame_init_from_blocked_task+0x30/0xa0 [<1010fd3c>] parisc_show_stack+0x3c/0xac [<10132c7c>] show_state_filter+0x80/0xd8 [<102f4074>] __handle_sysrq+0xd0/0x1b0 [<102f9558>] receive_chars+0x22c/0x318 [<102f9940>] serial8250_handle_port+0x40/0x88 [<102f9a8c>] serial8250_interrupt+0x104/0x10c [<10161920>] handle_IRQ_event+0x44/0x94 [<10161acc>] __do_IRQ+0x15c/0x1dc [<102c442c>] superio_interrupt+0x74/0xa8 [<10161920>] handle_IRQ_event+0x44/0x94 [<10161acc>] __do_IRQ+0x15c/0x1dc [<10110fb4>] do_cpu_irq_mask+0x90/0xbc [<10114068>] intr_return+0x0/0x4 Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/kernel/unwind.c')
-rw-r--r--arch/parisc/kernel/unwind.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 6773c582e457..69dad5a850a8 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -372,7 +372,7 @@ void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct
struct pt_regs *r = &t->thread.regs;
struct pt_regs *r2;
- r2 = kmalloc(sizeof(struct pt_regs), GFP_KERNEL);
+ r2 = kmalloc(sizeof(struct pt_regs), GFP_ATOMIC);
if (!r2)
return;
*r2 = *r;