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Commit c28aa1f0 authored by Joe Perches's avatar Joe Perches Committed by Linus Torvalds
Browse files

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: default avatarJoe Perches <joe@perches.com>
Reviewed-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8f073bd0

arch/ia64/include/asm/processor.h

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ 
#include <linux/compiler.h>

#include <linux/threads.h>

#include <linux/types.h>

#include <linux/bitops.h>



#include <asm/fpu.h>

#include <asm/page.h>

include/linux/cache.h

+2 −2
Original line number Diff line number Diff line 
#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

include/linux/printk.h

+10 −9
Original line number Diff line number Diff line
@@ -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[];
@@ -255,7 +256,7 @@ extern asmlinkage void dump_stack(void) __cold; 
#ifdef CONFIG_PRINTK

#define printk_once(fmt, ...)					\

({								\

	static bool __print_once;		\

	static bool __print_once __read_mostly;			\

								\

	if (!__print_once) {					\

		__print_once = true;				\