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Commit 789ce9b9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 

Pull per-cpu patches from Tejun Heo:
 "This pull request contains four patches.  One replaces manual clearing
  with bitmap_clear(), two fix generic definition of __this_cpu ops so
  that they don't choose unnecessarily strict arch version.  One makes
  _this_cpu definition use raw_local_irq_*() so that it doesn't end up
  wrecking irq on/off state tracking when used from inside lockdep.

  Of the four patches, the raw_local_irq_*() update is the most
  important, so please feel free to cherry pick only that one patch and
  ignore the rest if you want to - commit e920d597 'percpu: use
  raw_local_irq_* in _this_cpu op'."

* 'for-3.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: fix __this_cpu_{sub,inc,dec}_return() definition
  percpu: use raw_local_irq_* in _this_cpu op
  percpu: fix generic definition of __this_cpu_add_and_return()
  percpu: use bitmap_clear
parents 3a81a6e7 adb79506

include/linux/percpu.h

+15 −14
Original line number Diff line number Diff line
@@ -348,9 +348,9 @@ do { \ 
#define _this_cpu_generic_to_op(pcp, val, op)				\

do {									\

	unsigned long flags;						\

	local_irq_save(flags);						\

	raw_local_irq_save(flags);					\

	*__this_cpu_ptr(&(pcp)) op val;					\

	local_irq_restore(flags);					\

	raw_local_irq_restore(flags);					\

} while (0)



#ifndef this_cpu_write
@@ -449,10 +449,10 @@ do { \ 
({									\

	typeof(pcp) ret__;						\

	unsigned long flags;						\

	local_irq_save(flags);						\

	raw_local_irq_save(flags);					\

	__this_cpu_add(pcp, val);					\

	ret__ = __this_cpu_read(pcp);					\

	local_irq_restore(flags);					\

	raw_local_irq_restore(flags);					\

	ret__;								\

})
@@ -479,10 +479,10 @@ do { \ 
#define _this_cpu_generic_xchg(pcp, nval)				\

({	typeof(pcp) ret__;						\

	unsigned long flags;						\

	local_irq_save(flags);						\

	raw_local_irq_save(flags);					\

	ret__ = __this_cpu_read(pcp);					\

	__this_cpu_write(pcp, nval);					\

	local_irq_restore(flags);					\

	raw_local_irq_restore(flags);					\

	ret__;								\

})
@@ -507,11 +507,11 @@ do { \ 
({									\

	typeof(pcp) ret__;						\

	unsigned long flags;						\

	local_irq_save(flags);						\

	raw_local_irq_save(flags);					\

	ret__ = __this_cpu_read(pcp);					\

	if (ret__ == (oval))						\

		__this_cpu_write(pcp, nval);				\

	local_irq_restore(flags);					\

	raw_local_irq_restore(flags);					\

	ret__;								\

})
@@ -544,10 +544,10 @@ do { \ 
({									\

	int ret__;							\

	unsigned long flags;						\

	local_irq_save(flags);						\

	raw_local_irq_save(flags);					\

	ret__ = __this_cpu_generic_cmpxchg_double(pcp1, pcp2,		\

			oval1, oval2, nval1, nval2);			\

	local_irq_restore(flags);					\

	raw_local_irq_restore(flags);					\

	ret__;								\

})
@@ -718,12 +718,13 @@ do { \ 
# ifndef __this_cpu_add_return_8

#  define __this_cpu_add_return_8(pcp, val)	__this_cpu_generic_add_return(pcp, val)

# endif

# define __this_cpu_add_return(pcp, val)	__pcpu_size_call_return2(this_cpu_add_return_, pcp, val)

# define __this_cpu_add_return(pcp, val)	\

	__pcpu_size_call_return2(__this_cpu_add_return_, pcp, val)

#endif



#define __this_cpu_sub_return(pcp, val)	this_cpu_add_return(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_sub_return(pcp, val)	__this_cpu_add_return(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_generic_xchg(pcp, nval)				\

({	typeof(pcp) ret__;						\

mm/percpu-vm.c

+1 −2
Original line number Diff line number Diff line
@@ -184,8 +184,7 @@ static void pcpu_unmap_pages(struct pcpu_chunk *chunk, 
				   page_end - page_start);

	}



	for (i = page_start; i < page_end; i++)

		__clear_bit(i, populated);

	bitmap_clear(populated, page_start, page_end - page_start);

}



/**