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fs/fs-writeback.c: make 2 functions static 

Make the following needlessly global functions static:

- writeback_acquire()
- writeback_release()

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adrian Bunk 2008-04-29 00:58:56 -07:00 committed by Linus Torvalds
parent 67cde59537
commit f11b00f3bd
2 changed files with 39 additions and 41 deletions
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78
fs/fs-writeback.c
View File

@ -25,6 +25,45 @@
#include <linux/buffer_head.h> #include <linux/buffer_head.h>
#include "internal.h" #include "internal.h"
/**
* writeback_acquire - attempt to get exclusive writeback access to a device
* @bdi: the device's backing_dev_info structure
*
* It is a waste of resources to have more than one pdflush thread blocked on
* a single request queue. Exclusion at the request_queue level is obtained
* via a flag in the request_queue's backing_dev_info.state.
*
* Non-request_queue-backed address_spaces will share default_backing_dev_info,
* unless they implement their own. Which is somewhat inefficient, as this
* may prevent concurrent writeback against multiple devices.
*/
static int writeback_acquire(struct backing_dev_info *bdi)
{
return !test_and_set_bit(BDI_pdflush, &bdi->state);
}
/**
* writeback_in_progress - determine whether there is writeback in progress
* @bdi: the device's backing_dev_info structure.
*
* Determine whether there is writeback in progress against a backing device.
*/
int writeback_in_progress(struct backing_dev_info *bdi)
{
return test_bit(BDI_pdflush, &bdi->state);
}
/**
* writeback_release - relinquish exclusive writeback access against a device.
* @bdi: the device's backing_dev_info structure
*/
static void writeback_release(struct backing_dev_info *bdi)
{
BUG_ON(!writeback_in_progress(bdi));
clear_bit(BDI_pdflush, &bdi->state);
}
/** /**
* __mark_inode_dirty - internal function * __mark_inode_dirty - internal function
* @inode: inode to mark * @inode: inode to mark
@ -747,43 +786,4 @@ int generic_osync_inode(struct inode *inode, struct address_space *mapping, int
return err; return err;
} }
EXPORT_SYMBOL(generic_osync_inode); EXPORT_SYMBOL(generic_osync_inode);
/**
* writeback_acquire - attempt to get exclusive writeback access to a device
* @bdi: the device's backing_dev_info structure
*
* It is a waste of resources to have more than one pdflush thread blocked on
* a single request queue. Exclusion at the request_queue level is obtained
* via a flag in the request_queue's backing_dev_info.state.
*
* Non-request_queue-backed address_spaces will share default_backing_dev_info,
* unless they implement their own. Which is somewhat inefficient, as this
* may prevent concurrent writeback against multiple devices.
*/
int writeback_acquire(struct backing_dev_info *bdi)
{
return !test_and_set_bit(BDI_pdflush, &bdi->state);
}
/**
* writeback_in_progress - determine whether there is writeback in progress
* @bdi: the device's backing_dev_info structure.
*
* Determine whether there is writeback in progress against a backing device.
*/
int writeback_in_progress(struct backing_dev_info *bdi)
{
return test_bit(BDI_pdflush, &bdi->state);
}
/**
* writeback_release - relinquish exclusive writeback access against a device.
* @bdi: the device's backing_dev_info structure
*/
void writeback_release(struct backing_dev_info *bdi)
{
BUG_ON(!writeback_in_progress(bdi));
clear_bit(BDI_pdflush, &bdi->state);
}

2
include/linux/backing-dev.h
View File

@ -156,9 +156,7 @@ static inline unsigned long bdi_stat_error(struct backing_dev_info *bdi)
extern struct backing_dev_info default_backing_dev_info; extern struct backing_dev_info default_backing_dev_info;
void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page); void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page);
int writeback_acquire(struct backing_dev_info *bdi);
int writeback_in_progress(struct backing_dev_info *bdi); int writeback_in_progress(struct backing_dev_info *bdi);
void writeback_release(struct backing_dev_info *bdi);
static inline int bdi_congested(struct backing_dev_info *bdi, int bdi_bits) static inline int bdi_congested(struct backing_dev_info *bdi, int bdi_bits)
{ {