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Commit e577ebde authored by Wu Fengguang's avatar Wu Fengguang Committed by Linus Torvalds
Browse files

page-types: make voffset local variables 



Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4a1b6726

Documentation/vm/page-types.c

+21 −18
Original line number Diff line number Diff line
@@ -159,7 +159,6 @@ static unsigned long opt_size[MAX_ADDR_RANGES]; 
static int		nr_vmas;

static unsigned long	pg_start[MAX_VMAS];

static unsigned long	pg_end[MAX_VMAS];

static unsigned long	voffset;



#define MAX_BIT_FILTERS	64

static int		nr_bit_filters;
@@ -328,7 +327,8 @@ static char *page_flag_longname(uint64_t flags) 
 * page list and summary

 */



static void show_page_range(unsigned long offset, uint64_t flags)

static void show_page_range(unsigned long voffset,

			    unsigned long offset, uint64_t flags)

{

	static uint64_t      flags0;

	static unsigned long voff;
@@ -354,7 +354,8 @@ static void show_page_range(unsigned long offset, uint64_t flags) 
	count  = 1;

}



static void show_page(unsigned long offset, uint64_t flags)

static void show_page(unsigned long voffset,

		      unsigned long offset, uint64_t flags)

{

	if (opt_pid)

		printf("%lx\t", voffset);
@@ -435,7 +436,6 @@ static uint64_t well_known_flags(uint64_t flags) 
	return flags;

}





/*

 * page frame walker

 */
@@ -467,7 +467,8 @@ static int hash_slot(uint64_t flags) 
	exit(EXIT_FAILURE);

}



static void add_page(unsigned long offset, uint64_t flags)

static void add_page(unsigned long voffset,

		     unsigned long offset, uint64_t flags)

{

	flags = expand_overloaded_flags(flags);
@@ -478,16 +479,18 @@ static void add_page(unsigned long offset, uint64_t flags) 
		return;



	if (opt_list == 1)

		show_page_range(offset, flags);

		show_page_range(voffset, offset, flags);

	else if (opt_list == 2)

		show_page(offset, flags);

		show_page(voffset, offset, flags);



	nr_pages[hash_slot(flags)]++;

	total_pages++;

}



#define KPAGEFLAGS_BATCH	(64 << 10)	/* 64k pages */

static void walk_pfn(unsigned long index, unsigned long count)

static void walk_pfn(unsigned long voffset,

		     unsigned long index,

		     unsigned long count)

{

	uint64_t buf[KPAGEFLAGS_BATCH];

	unsigned long batch;
@@ -501,7 +504,7 @@ static void walk_pfn(unsigned long index, unsigned long count) 
			break;



		for (i = 0; i < pages; i++)

			add_page(index + i, buf[i]);

			add_page(voffset + i, index + i, buf[i]);



		index += pages;

		count -= pages;
@@ -525,9 +528,8 @@ static void walk_vma(unsigned long index, unsigned long count) 


		for (i = 0; i < pages; i++) {

			pfn = pagemap_pfn(buf[i]);

			voffset = index + i;

			if (pfn)

				walk_pfn(pfn, 1);

				walk_pfn(index + i, pfn, 1);

		}



		index += pages;
@@ -537,8 +539,9 @@ static void walk_vma(unsigned long index, unsigned long count) 


static void walk_task(unsigned long index, unsigned long count)

{

	int i = 0;

	const unsigned long end = index + count;

	unsigned long start;

	int i = 0;



	while (index < end) {
@@ -548,11 +551,11 @@ static void walk_task(unsigned long index, unsigned long count) 
		if (pg_start[i] >= end)

			return;



		voffset = max_t(unsigned long, pg_start[i], index);

		start = max_t(unsigned long, pg_start[i], index);

		index = min_t(unsigned long, pg_end[i], end);



		assert(voffset < index);

		walk_vma(voffset, index - voffset);

		assert(start < index);

		walk_vma(start, index - start);

	}

}
@@ -577,7 +580,7 @@ static void walk_addr_ranges(void) 


	for (i = 0; i < nr_addr_ranges; i++)

		if (!opt_pid)

			walk_pfn(opt_offset[i], opt_size[i]);

			walk_pfn(0, opt_offset[i], opt_size[i]);

		else

			walk_task(opt_offset[i], opt_size[i]);
@@ -879,7 +882,7 @@ int main(int argc, char *argv[]) 
	walk_addr_ranges();



	if (opt_list == 1)

		show_page_range(0, 0);  /* drain the buffer */

		show_page_range(0, 0, 0);  /* drain the buffer */



	if (opt_no_summary)

		return 0;