Subject: + printk-cache-mark-printk_once-test-variable-__read_mostly.patch added to -mm tree
To: joe@xxxxxxxxxxx,james.hogan@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 05 Nov 2013 16:06:26 -0800
The patch titled
Subject: printk/cache: Mark printk_once test variable __read_mostly
has been added to the -mm tree. Its filename is
printk-cache-mark-printk_once-test-variable-__read_mostly.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/printk-cache-mark-printk_once-test-variable-__read_mostly.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/printk-cache-mark-printk_once-test-variable-__read_mostly.patch
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------------------------------------------------------
From: Joe Perches <joe@xxxxxxxxxxx>
Subject: printk/cache: Mark printk_once test variable __read_mostly
Add #include <linux/cache.h> to define __read_mostly.
Convert cache.h to use uapi/linux/kernel.h instead
of linux/kernel.h to avoid recursive #includes.
Convert the ALIGN macro to __ALIGN_KERNEL.
printk_once only sets the bool variable tested
once so mark it __read_mostly.
Neaten the alignment so it matches the rest of the
pr_<level>_once #defines too.
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Reviewed-by: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/cache.h | 4 ++--
include/linux/printk.h | 19 ++++++++++---------
2 files changed, 12 insertions(+), 11 deletions(-)
diff -puN include/linux/cache.h~printk-cache-mark-printk_once-test-variable-__read_mostly include/linux/cache.h
--- a/include/linux/cache.h~printk-cache-mark-printk_once-test-variable-__read_mostly
+++ a/include/linux/cache.h
@@ -1,11 +1,11 @@
#ifndef __LINUX_CACHE_H
#define __LINUX_CACHE_H
-#include <linux/kernel.h>
+#include <uapi/linux/kernel.h>
#include <asm/cache.h>
#ifndef L1_CACHE_ALIGN
-#define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES)
+#define L1_CACHE_ALIGN(x) __ALIGN_KERNEL(x, L1_CACHE_BYTES)
#endif
#ifndef SMP_CACHE_BYTES
diff -puN include/linux/printk.h~printk-cache-mark-printk_once-test-variable-__read_mostly include/linux/printk.h
--- a/include/linux/printk.h~printk-cache-mark-printk_once-test-variable-__read_mostly
+++ a/include/linux/printk.h
@@ -5,6 +5,7 @@
#include <linux/init.h>
#include <linux/kern_levels.h>
#include <linux/linkage.h>
+#include <linux/cache.h>
extern const char linux_banner[];
extern const char linux_proc_banner[];
@@ -251,17 +252,17 @@ extern asmlinkage void dump_stack(void)
*/
#ifdef CONFIG_PRINTK
-#define printk_once(fmt, ...) \
-({ \
- static bool __print_once; \
- \
- if (!__print_once) { \
- __print_once = true; \
- printk(fmt, ##__VA_ARGS__); \
- } \
+#define printk_once(fmt, ...) \
+({ \
+ static bool __print_once __read_mostly; \
+ \
+ if (!__print_once) { \
+ __print_once = true; \
+ printk(fmt, ##__VA_ARGS__); \
+ } \
})
#else
-#define printk_once(fmt, ...) \
+#define printk_once(fmt, ...) \
no_printk(fmt, ##__VA_ARGS__)
#endif
_
Patches currently in -mm which might be from joe@xxxxxxxxxxx are
kernel-timerc-convert-kmalloc_nodegfp_zero-to-kzalloc_node.patch
ksm-remove-redundant-__gfp_zero-from-kcalloc.patch
printk-report-console-names-during-cut-over.patch
kernel-printk-printkc-convert-to-pr_foo.patch
vsprintf-check-real-user-group-id-for-%pk.patch
printkc-comments-should-refer-to-proc-vmcore-instead-of-proc-vmcoreinfo.patch
printk-cache-mark-printk_once-test-variable-__read_mostly.patch
get_maintainerpl-incomplete-output.patch
checkpatch-report-missing-spaces-around-trigraphs-with-strict.patch
checkpatch-extend-camelcase-types-and-ignore-existing-camelcase-uses-in-a-patch.patch
checkpatch-update-seq_foo-tests.patch
checkpatch-find-camelcase-definitions-of-struct-union-enum.patch
checkpatch-add-test-for-defines-of-arch_has_foo.patch
checkpatch-add-rules-to-check-init-attribute-and-const-defects.patch
checkpatch-make-the-memory-barrier-test-noisier.patch
checkpatchpl-check-for-the-fsf-mailing-address.patch
checkpatch-improve-return-is-not-a-function-test.patch
checkpatch-add-check-for-sscanf-without-return-use.patch
checkpatch-add-check-for-sscanf-without-return-use-v2.patch
drivers-rtc-rtc-puv3c-use-dev_dbg-instead-of-pr_debug.patch
drivers-rtc-rtc-pl030c-use-devm_kzalloc-instead-of-kmalloc.patch
kernel-modulec-use-pr_foo.patch
linux-next.patch
seq_file-introduce-seq_setwidth-and-seq_pad.patch
seq_file-remove-%n-usage-from-seq_file-users.patch
vsprintf-ignore-%n-again.patch
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