xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

percpu: Remove irqsafe_cpu_xxx variants

Browse Source 
We simply say that regular this_cpu use must be safe regardless of
preemption and interrupt state.  That has no material change for x86
and s390 implementations of this_cpu operations.  However, arches that
do not provide their own implementation for this_cpu operations will
now get code generated that disables interrupts instead of preemption.

-tj: This is part of on-going percpu API cleanup.  For detailed
     discussion of the subject, please refer to the following thread.

     http://thread.gmane.org/gmane.linux.kernel/1222078

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1112221154380.11787@router.home>
This commit is contained in:
Christoph Lameter
2011-12-22 11:58:51 -06:00
committed by Tejun Heo
parent ecefc36b41
commit 933393f58f
9 changed files with 62 additions and 236 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
arch/s390/include/asm/percpu.h
View File

@@ -19,7 +19,7 @@
#define ARCH_NEEDS_WEAK_PER_CPU
#endif
#define arch_irqsafe_cpu_to_op(pcp, val, op) \
#define arch_this_cpu_to_op(pcp, val, op) \
do { \
typedef typeof(pcp) pcp_op_T__; \
pcp_op_T__ old__, new__, prev__; \
@@ -41,27 +41,27 @@ do { \
preempt_enable(); \
} while (0)
#define irqsafe_cpu_add_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
#define irqsafe_cpu_add_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
#define irqsafe_cpu_add_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
#define irqsafe_cpu_add_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, +)
#define this_cpu_add_1(pcp, val) arch_this_cpu_to_op(pcp, val, +)
#define this_cpu_add_2(pcp, val) arch_this_cpu_to_op(pcp, val, +)
#define this_cpu_add_4(pcp, val) arch_this_cpu_to_op(pcp, val, +)
#define this_cpu_add_8(pcp, val) arch_this_cpu_to_op(pcp, val, +)
#define irqsafe_cpu_and_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
#define irqsafe_cpu_and_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
#define irqsafe_cpu_and_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
#define irqsafe_cpu_and_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, &)
#define this_cpu_and_1(pcp, val) arch_this_cpu_to_op(pcp, val, &)
#define this_cpu_and_2(pcp, val) arch_this_cpu_to_op(pcp, val, &)
#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, &)
#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op(pcp, val, &)
#define irqsafe_cpu_or_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
#define irqsafe_cpu_or_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
#define irqsafe_cpu_or_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
#define irqsafe_cpu_or_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, |)
#define this_cpu_or_1(pcp, val) arch_this_cpu_to_op(pcp, val, |)
#define this_cpu_or_2(pcp, val) arch_this_cpu_to_op(pcp, val, |)
#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op(pcp, val, |)
#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op(pcp, val, |)
#define irqsafe_cpu_xor_1(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
#define irqsafe_cpu_xor_2(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
#define irqsafe_cpu_xor_4(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
#define irqsafe_cpu_xor_8(pcp, val) arch_irqsafe_cpu_to_op(pcp, val, ^)
#define this_cpu_xor_1(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
#define this_cpu_xor_2(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
#define this_cpu_xor_4(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
#define this_cpu_xor_8(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
#define arch_irqsafe_cpu_cmpxchg(pcp, oval, nval) \
#define arch_this_cpu_cmpxchg(pcp, oval, nval) \
({ \
typedef typeof(pcp) pcp_op_T__; \
pcp_op_T__ ret__; \
@@ -79,10 +79,10 @@ do { \
ret__; \
})
#define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
#define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) arch_irqsafe_cpu_cmpxchg(pcp, oval, nval)
#define this_cpu_cmpxchg_1(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
#define this_cpu_cmpxchg_2(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
#define this_cpu_cmpxchg_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
#include <asm-generic/percpu.h>