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https://github.com/edk2-porting/linux-next.git
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locking/mcs: Allow architecture specific asm files to be used for contended case
This patch allows each architecture to add its specific assembly optimized arch_mcs_spin_lock_contended and arch_mcs_spinlock_uncontended for MCS lock and unlock functions. Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Scott J Norton <scott.norton@hp.com> Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Cc: AswinChandramouleeswaran <aswin@hp.com> Cc: George Spelvin <linux@horizon.com> Cc: Rik vanRiel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: MichelLespinasse <walken@google.com> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Alex Shi <alex.shi@linaro.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Figo.zhang" <figo1802@gmail.com> Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Davidlohr Bueso <davidlohr.bueso@hp.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matthew R Wilcox <matthew.r.wilcox@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1390347382.3138.67.camel@schen9-DESK Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -3,5 +3,6 @@
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generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -22,6 +22,7 @@ generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += msgbuf.h
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generic-y += param.h
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@ -14,6 +14,7 @@ generic-y += irq_regs.h
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generic-y += kdebug.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += msgbuf.h
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generic-y += param.h
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generic-y += parport.h
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@ -23,6 +23,7 @@ generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += msgbuf.h
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generic-y += mutex.h
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@ -11,6 +11,7 @@ generic-y += hash.h
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generic-y += irq_regs.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += param.h
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generic-y += percpu.h
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generic-y += preempt.h
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@ -20,6 +20,7 @@ generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += msgbuf.h
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generic-y += mutex.h
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@ -25,6 +25,7 @@ generic-y += irq_regs.h
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generic-y += kdebug.h
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generic-y += kmap_types.h
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generic-y += local.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += mmu.h
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generic-y += mmu_context.h
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@ -9,6 +9,7 @@ generic-y += exec.h
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generic-y += hash.h
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generic-y += kvm_para.h
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generic-y += linkage.h
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generic-y += mcs_spinlock.h
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generic-y += module.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -2,5 +2,6 @@
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generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -27,6 +27,7 @@ generic-y += kdebug.h
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generic-y += kmap_types.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += msgbuf.h
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generic-y += pci.h
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@ -3,6 +3,7 @@ generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += kvm_para.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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generic-y += vtime.h
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@ -2,6 +2,7 @@
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generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += module.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -16,6 +16,7 @@ generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += mutex.h
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generic-y += percpu.h
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@ -24,6 +24,7 @@ generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += msgbuf.h
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generic-y += mutex.h
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generic-y += param.h
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@ -3,6 +3,7 @@ generic-y += barrier.h
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generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += syscalls.h
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generic-y += trace_clock.h
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@ -4,6 +4,7 @@ generic-y += current.h
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generic-y += emergency-restart.h
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generic-y += hash.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mutex.h
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generic-y += parport.h
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generic-y += percpu.h
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@ -3,5 +3,6 @@ generic-y += barrier.h
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generic-y += clkdev.h
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generic-y += exec.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -35,6 +35,7 @@ generic-y += kdebug.h
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generic-y += kmap_types.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += module.h
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generic-y += msgbuf.h
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@ -14,6 +14,7 @@ generic-y += kdebug.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mutex.h
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generic-y += param.h
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generic-y += percpu.h
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@ -1,6 +1,7 @@
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generic-y += clkdev.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += rwsem.h
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generic-y += trace_clock.h
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@ -2,5 +2,6 @@
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generic-y += clkdev.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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@ -5,6 +5,7 @@ header-y +=
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generic-y += barrier.h
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generic-y += clkdev.h
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generic-y += hash.h
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generic-y += mcs_spinlock.h
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generic-y += preempt.h
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generic-y += trace_clock.h
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generic-y += xor.h
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@ -15,6 +15,7 @@ generic-y += irq_regs.h
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generic-y += kvm_para.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += msgbuf.h
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generic-y += param.h
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@ -11,6 +11,7 @@ generic-y += irq_regs.h
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generic-y += linkage.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += module.h
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generic-y += mutex.h
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generic-y += preempt.h
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@ -19,6 +19,7 @@ generic-y += ipcbuf.h
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generic-y += irq_regs.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += msgbuf.h
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generic-y += mutex.h
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generic-y += param.h
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@ -15,6 +15,7 @@ generic-y += hw_irq.h
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generic-y += io.h
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generic-y += irq_regs.h
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generic-y += kdebug.h
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generic-y += mcs_spinlock.h
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generic-y += mutex.h
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generic-y += param.h
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generic-y += pci.h
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@ -25,6 +25,7 @@ generic-y += irq_regs.h
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generic-y += kdebug.h
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generic-y += kmap_types.h
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generic-y += local.h
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generic-y += mcs_spinlock.h
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generic-y += mman.h
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generic-y += module.h
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generic-y += msgbuf.h
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@ -5,3 +5,4 @@ genhdr-y += unistd_64.h
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genhdr-y += unistd_x32.h
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generic-y += clkdev.h
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generic-y += mcs_spinlock.h
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@ -18,6 +18,7 @@ generic-y += kvm_para.h
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generic-y += linkage.h
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generic-y += local.h
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generic-y += local64.h
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generic-y += mcs_spinlock.h
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generic-y += percpu.h
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generic-y += preempt.h
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generic-y += resource.h
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13
include/asm-generic/mcs_spinlock.h
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13
include/asm-generic/mcs_spinlock.h
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#ifndef __ASM_MCS_SPINLOCK_H
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#define __ASM_MCS_SPINLOCK_H
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/*
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* Architectures can define their own:
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*
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* arch_mcs_spin_lock_contended(l)
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* arch_mcs_spin_unlock_contended(l)
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*
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* See kernel/locking/mcs_spinlock.c.
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*/
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#endif /* __ASM_MCS_SPINLOCK_H */
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#ifndef __LINUX_MCS_SPINLOCK_H
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#define __LINUX_MCS_SPINLOCK_H
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#include <asm/mcs_spinlock.h>
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struct mcs_spinlock {
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struct mcs_spinlock *next;
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int locked; /* 1 if lock acquired */
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