From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
Frederic Weisbecker <fweisbec@gmail.com>,
Jason Baron <jbaron@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Subject: [PATCH 5/6] jump label: Add _ASM_ALIGN for x86 and x86_64
Date: Mon, 04 Apr 2011 15:16:59 -0400 [thread overview]
Message-ID: <20110404191833.040858028@goodmis.org> (raw)
In-Reply-To: 20110404191654.006849945@goodmis.org
[-- Attachment #1: 0005-jump-label-Add-_ASM_ALIGN-for-x86-and-x86_64.patch --]
[-- Type: text/plain, Size: 1138 bytes --]
From: Jason Baron <jbaron@redhat.com>
The linker should not be adding holes to word size aligned pointers, but
out of paranoia we are explicitly specifying that alignment. I have not
seen any holes in the jump label section in practice.
Signed-off-by: Jason Baron <jbaron@redhat.com>
LKML-Reference: <e119fbd060c9452c56063ea6148ba1070e7434cc.1300299760.git.jbaron@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
arch/x86/include/asm/jump_label.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/jump_label.h b/arch/x86/include/asm/jump_label.h
index f217cee..a32b18c 100644
--- a/arch/x86/include/asm/jump_label.h
+++ b/arch/x86/include/asm/jump_label.h
@@ -16,6 +16,7 @@ static __always_inline bool arch_static_branch(struct jump_label_key *key)
asm goto("1:"
JUMP_LABEL_INITIAL_NOP
".pushsection __jump_table, \"aw\" \n\t"
+ _ASM_ALIGN "\n\t"
_ASM_PTR "1b, %l[l_yes], %c0 \n\t"
".popsection \n\t"
: : "i" (key) : : l_yes);
--
1.7.2.3
next prev parent reply other threads:[~2011-04-04 19:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-04 19:16 [PATCH 0/6] [GIT PULL][v2.6.40] tracing: updates and jump label rebase Steven Rostedt
2011-04-04 19:16 ` [PATCH 1/6] tracing: Convert trace_printk() formats for module to const char * Steven Rostedt
2011-04-04 19:16 ` [PATCH 2/6] tracing: Print trace_bprintk() formats for modules too Steven Rostedt
2011-04-04 19:16 ` [PATCH 3/6] tracing: Avoid soft lockup in trace_pipe Steven Rostedt
2011-04-04 19:16 ` [PATCH 4/6] jump label: Introduce static_branch() interface Steven Rostedt
2011-04-04 19:16 ` Steven Rostedt [this message]
2011-04-04 19:17 ` [PATCH 6/6] jump label: Add s390 support Steven Rostedt
-- strict thread matches above, loose matches on Subject: below --
2011-04-20 15:58 [PATCH 0/6] [GIT PULL][v2.6.40] tracing: updates and jump label rebase Steven Rostedt
2011-04-20 15:58 ` [PATCH 5/6] jump label: Add _ASM_ALIGN for x86 and x86_64 Steven Rostedt
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