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authorIngo Molnar <mingo@elte.hu>2009-08-03 03:31:54 -0400
committerIngo Molnar <mingo@elte.hu>2009-08-03 03:56:52 -0400
commit47cab6a722d44c71c4f8224017ef548522243cf4 (patch)
tree477bbe67a203d9704792d6ce46a9f1199587ddfe /arch/sparc/kernel
parentc1dc0b9c0c8979ce4d411caadff5c0d79dee58bc (diff)
debug lockups: Improve lockup detection, fix generic arch fallback
As Andrew noted, my previous patch ("debug lockups: Improve lockup detection") broke/removed SysRq-L support from architecture that do not provide a __trigger_all_cpu_backtrace implementation. Restore a fallback path and clean up the SysRq-L machinery a bit: - Rename the arch method to arch_trigger_all_cpu_backtrace() - Simplify the define - Document the method a bit - in the hope of more architectures adding support for it. [ The patch touches Sparc code for the rename. ] Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "David S. Miller" <davem@davemloft.net> LKML-Reference: <20090802140809.7ec4bb6b.akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/process_64.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 4041f94e7724..18d67854a1b8 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -251,7 +251,7 @@ static void __global_reg_poll(struct global_reg_snapshot *gp)
251 } 251 }
252} 252}
253 253
254void __trigger_all_cpu_backtrace(void) 254void arch_trigger_all_cpu_backtrace(void)
255{ 255{
256 struct thread_info *tp = current_thread_info(); 256 struct thread_info *tp = current_thread_info();
257 struct pt_regs *regs = get_irq_regs(); 257 struct pt_regs *regs = get_irq_regs();
@@ -304,7 +304,7 @@ void __trigger_all_cpu_backtrace(void)
304 304
305static void sysrq_handle_globreg(int key, struct tty_struct *tty) 305static void sysrq_handle_globreg(int key, struct tty_struct *tty)
306{ 306{
307 __trigger_all_cpu_backtrace(); 307 arch_trigger_all_cpu_backtrace();
308} 308}
309 309
310static struct sysrq_key_op sparc_globalreg_op = { 310static struct sysrq_key_op sparc_globalreg_op = {