From 904656cda10ce985e6bc8b16488b58236eaec8e2 Mon Sep 17 00:00:00 2001 From: Robin Getz Date: Wed, 26 Mar 2008 09:17:43 +0800 Subject: [PATCH] [Blackfin] arch: fix bug - grab locks when not atomic grab locks when not atomic - this fixes the issues sometimes seen when using magic sysrq. Signed-off-by: Robin Getz Signed-off-by: Bryan Wu --- arch/blackfin/kernel/traps.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 7557d0dce216..de249d6fdd9c 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -75,7 +75,7 @@ static void decode_address(char *buf, unsigned long address) struct task_struct *p; struct mm_struct *mm; unsigned long flags, offset; - unsigned int in_exception = bfin_read_IPEND() & 0x10; + unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); #ifdef CONFIG_KALLSYMS unsigned long symsize; @@ -117,7 +117,7 @@ static void decode_address(char *buf, unsigned long address) */ write_lock_irqsave(&tasklist_lock, flags); for_each_process(p) { - mm = (in_exception ? p->mm : get_task_mm(p)); + mm = (in_atomic ? p->mm : get_task_mm(p)); if (!mm) continue; @@ -146,14 +146,14 @@ static void decode_address(char *buf, unsigned long address) sprintf(buf, "<0x%p> [ %s + 0x%lx ]", (void *)address, name, offset); - if (!in_exception) + if (!in_atomic) mmput(mm); goto done; } vml = vml->next; } - if (!in_exception) + if (!in_atomic) mmput(mm); } -- 2.20.1