From: Cliff Wickman <cpw@sgi.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu
Subject: [PATCH 1 of 6] x86, UV: smp_processor_id in a preemptable region
Date: Tue, 14 Jun 2011 18:06:29 -0500 [thread overview]
Message-ID: <E1QWcgn-0004Mv-T6@eag09.americas.sgi.com> (raw)
From: Cliff Wickman <cpw@sgi.com>
Calling smp_processor_id() from within a preemptable region will issue
a warning if DEBUG_PREEMPT is set.
Diffed against 3.0.0-rc3
Signed-off-by: Cliff Wickman <cpw@sgi.com>
---
arch/x86/platform/uv/tlb_uv.c | 2 ++
1 file changed, 2 insertions(+)
Index: linux/arch/x86/platform/uv/tlb_uv.c
===================================================================
--- linux.orig/arch/x86/platform/uv/tlb_uv.c
+++ linux/arch/x86/platform/uv/tlb_uv.c
@@ -1334,7 +1334,9 @@ static ssize_t tunables_write(struct fil
instr[count] = '\0';
+ preempt_disable(); /* avoid DEBUG_PREEMPT warning */
bcp = &per_cpu(bau_control, smp_processor_id());
+ preempt_enable_no_resched();
ret = parse_tunables_write(bcp, instr, count);
if (ret)
next reply other threads:[~2011-06-14 23:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-14 23:06 Cliff Wickman [this message]
2011-06-15 6:05 ` Rakib Mullick
2011-06-15 13:52 ` Cliff Wickman
2011-06-15 15:54 ` Ingo Molnar
2011-06-15 16:07 ` Cliff Wickman
2011-06-15 16:15 ` Ingo Molnar
2011-06-15 16:40 ` Cliff Wickman
2011-06-15 17:21 ` H. Peter Anvin
2011-06-15 18:58 ` Cliff Wickman
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