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percpu: use raw_cpu_*() to define __this_cpu_*() 

__this_cpu_*() operations are the same as raw_cpu_*() operations
except for the added __this_cpu_preempt_check().  Curiously, these
were defined using __pcu_size_call_*() instead of being layered on top
of raw_cpu_*().

Let's layer them so that __this_cpu_*() are defined in terms of
raw_cpu_*().  It's simpler and less error-prone this way.

This patch doesn't introduce any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Christoph Lameter <cl@linux.com>
This commit is contained in:
Tejun Heo 2014-06-17 19:12:39 -04:00
parent 9c28278a24
commit cadb1c4db2
1 changed files with 9 additions and 9 deletions
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18
include/linux/percpu-defs.h
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@ -403,16 +403,16 @@ do { \
* Generic percpu operations for context that are safe from preemption/interrupts.
*/
# define __this_cpu_read(pcp) \
(__this_cpu_preempt_check("read"),__pcpu_size_call_return(raw_cpu_read_, (pcp)))
(__this_cpu_preempt_check("read"),raw_cpu_read(pcp))
# define __this_cpu_write(pcp, val) \
do { __this_cpu_preempt_check("write"); \
__pcpu_size_call(raw_cpu_write_, (pcp), (val)); \
raw_cpu_write(pcp, val); \
} while (0)
# define __this_cpu_add(pcp, val) \
do { __this_cpu_preempt_check("add"); \
__pcpu_size_call(raw_cpu_add_, (pcp), (val)); \
raw_cpu_add(pcp, val); \
} while (0)
# define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(typeof(pcp))(val))
@ -421,29 +421,29 @@ do { __this_cpu_preempt_check("add"); \
# define __this_cpu_and(pcp, val) \
do { __this_cpu_preempt_check("and"); \
__pcpu_size_call(raw_cpu_and_, (pcp), (val)); \
raw_cpu_and(pcp, val); \
} while (0)
# define __this_cpu_or(pcp, val) \
do { __this_cpu_preempt_check("or"); \
__pcpu_size_call(raw_cpu_or_, (pcp), (val)); \
raw_cpu_or(pcp, val); \
} while (0)
# define __this_cpu_add_return(pcp, val) \
(__this_cpu_preempt_check("add_return"),__pcpu_size_call_return2(raw_cpu_add_return_, pcp, val))
(__this_cpu_preempt_check("add_return"),raw_cpu_add_return(pcp, val))
#define __this_cpu_sub_return(pcp, val) __this_cpu_add_return(pcp, -(typeof(pcp))(val))
#define __this_cpu_inc_return(pcp) __this_cpu_add_return(pcp, 1)
#define __this_cpu_dec_return(pcp) __this_cpu_add_return(pcp, -1)
# define __this_cpu_xchg(pcp, nval) \
(__this_cpu_preempt_check("xchg"),__pcpu_size_call_return2(raw_cpu_xchg_, (pcp), nval))
(__this_cpu_preempt_check("xchg"),raw_cpu_xchg(pcp, nval))
# define __this_cpu_cmpxchg(pcp, oval, nval) \
(__this_cpu_preempt_check("cmpxchg"),__pcpu_size_call_return2(raw_cpu_cmpxchg_, pcp, oval, nval))
(__this_cpu_preempt_check("cmpxchg"),raw_cpu_cmpxchg(pcp, oval, nval))
# define __this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
(__this_cpu_preempt_check("cmpxchg_double"),__pcpu_double_call_return_bool(raw_cpu_cmpxchg_double_, (pcp1), (pcp2), (oval1), (oval2), (nval1), (nval2)))
(__this_cpu_preempt_check("cmpxchg_double"),raw_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2))
/*
* this_cpu_*() operations are used for accesses that must be done in a