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Commit cc76ee75 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull core locking changes from Ingo Molnar:
 "Main changes:

   - jump label asm preparatory work for PowerPC (Anton Blanchard)

   - rwsem optimizations and cleanups (Davidlohr Bueso)

   - mutex optimizations and cleanups (Jason Low)

   - futex fix (Oleg Nesterov)

   - remove broken atomicity checks from {READ,WRITE}_ONCE() (Peter
     Zijlstra)"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  powerpc, jump_label: Include linux/jump_label.h to get HAVE_JUMP_LABEL define
  jump_label: Allow jump labels to be used in assembly
  jump_label: Allow asm/jump_label.h to be included in assembly
  locking/mutex: Further simplify mutex_spin_on_owner()
  locking: Remove atomicy checks from {READ,WRITE}_ONCE
  locking/rtmutex: Rename argument in the rt_mutex_adjust_prio_chain() documentation as well
  locking/rwsem: Fix lock optimistic spinning when owner is not running
  locking: Remove ACCESS_ONCE() usage
  locking/rwsem: Check for active lock before bailing on spinning
  locking/rwsem: Avoid deceiving lock spinners
  locking/rwsem: Set lock ownership ASAP
  locking/rwsem: Document barrier need when waking tasks
  locking/futex: Check PF_KTHREAD rather than !p->mm to filter out kthreads
  locking/mutex: Refactor mutex_spin_on_owner()
  locking/mutex: In mutex_spin_on_owner(), return true when owner changes
parents 9c65e12a 58995a9a

Makefile

+1 −0
Original line number Diff line number Diff line
@@ -779,6 +779,7 @@ KBUILD_ARFLAGS := $(call ar-option,D) 
# check for 'asm goto'

ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)

	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO

	KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO

endif



include $(srctree)/scripts/Makefile.kasan

arch/arm/include/asm/jump_label.h

+2 −3
Original line number Diff line number Diff line 
#ifndef _ASM_ARM_JUMP_LABEL_H

#define _ASM_ARM_JUMP_LABEL_H



#ifdef __KERNEL__

#ifndef __ASSEMBLY__



#include <linux/types.h>
@@ -27,8 +27,6 @@ static __always_inline bool arch_static_branch(struct static_key *key) 
	return true;

}



#endif /* __KERNEL__ */



typedef u32 jump_label_t;



struct jump_entry {
@@ -37,4 +35,5 @@ struct jump_entry { 
	jump_label_t key;

};



#endif  /* __ASSEMBLY__ */

#endif

arch/arm64/include/asm/jump_label.h

+4 −4
Original line number Diff line number Diff line
@@ -18,11 +18,12 @@ 
 */

#ifndef __ASM_JUMP_LABEL_H

#define __ASM_JUMP_LABEL_H



#ifndef __ASSEMBLY__



#include <linux/types.h>

#include <asm/insn.h>



#ifdef __KERNEL__



#define JUMP_LABEL_NOP_SIZE		AARCH64_INSN_SIZE



static __always_inline bool arch_static_branch(struct static_key *key)
@@ -39,8 +40,6 @@ static __always_inline bool arch_static_branch(struct static_key *key) 
	return true;

}



#endif /* __KERNEL__ */



typedef u64 jump_label_t;



struct jump_entry {
@@ -49,4 +48,5 @@ struct jump_entry { 
	jump_label_t key;

};



#endif  /* __ASSEMBLY__ */

#endif	/* __ASM_JUMP_LABEL_H */

arch/mips/include/asm/jump_label.h

+3 −4
Original line number Diff line number Diff line
@@ -8,9 +8,9 @@ 
#ifndef _ASM_MIPS_JUMP_LABEL_H

#define _ASM_MIPS_JUMP_LABEL_H



#include <linux/types.h>

#ifndef __ASSEMBLY__



#ifdef __KERNEL__

#include <linux/types.h>



#define JUMP_LABEL_NOP_SIZE 4
@@ -39,8 +39,6 @@ static __always_inline bool arch_static_branch(struct static_key *key) 
	return true;

}



#endif /* __KERNEL__ */



#ifdef CONFIG_64BIT

typedef u64 jump_label_t;

#else
@@ -53,4 +51,5 @@ struct jump_entry { 
	jump_label_t key;

};



#endif  /* __ASSEMBLY__ */

#endif /* _ASM_MIPS_JUMP_LABEL_H */

arch/powerpc/platforms/powernv/opal-wrappers.S

+1 −1
Original line number Diff line number Diff line
@@ -9,11 +9,11 @@ 
 * 2 of the License, or (at your option) any later version.

 */



#include <linux/jump_label.h>

#include <asm/ppc_asm.h>

#include <asm/hvcall.h>

#include <asm/asm-offsets.h>

#include <asm/opal.h>

#include <asm/jump_label.h>



	.section	".text"