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writeback: move MIN_WRITEBACK_PAGES to fs-writeback.c

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Fix compile error

 fs/fs-writeback.c:515:33: error: ‘PAGE_CACHE_SHIFT’ undeclared (first use in this function)

Reported-by: Randy Dunlap <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Signed-off-by: Wu Fengguang <[email protected]>
This commit is contained in:
Wu Fengguang 2012-01-07 20:41:55 -06:00
commit bc31b86a59
2 changed files with 6 additions and 5 deletions
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6
fs/fs-writeback.c
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@ -20,6 +20,7 @@
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/writeback.h>
@ -29,6 +30,11 @@
#include <linux/tracepoint.h>
#include "internal.h"
/*
* 4MB minimal write chunk size
*/
#define MIN_WRITEBACK_PAGES (4096UL >> (PAGE_CACHE_SHIFT - 10))
/*
* Passed into wb_writeback(), essentially a subset of writeback_control
*/