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readahead: code cleanup

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Rename file_ra_state.prev_page to prev_index and file_ra_state.offset to
prev_offset.  Also update of prev_index in do_generic_mapping_read() is now
moved close to the update of prev_offset.

[wfg@mail.ustc.edu.cn: fix it]
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Kara 2007-05-06 14:49:26 -07:00 • committed by Linus Torvalds
parent ec0f163722
commit 6ce745ed39
3 changed files with 21 additions and 20 deletions
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4
include/linux/fs.h
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@ -696,13 +696,13 @@ struct file_ra_state {
unsigned long size;
unsigned long flags; /* ra flags RA_FLAG_xxx*/
unsigned long cache_hit; /* cache hit count*/
unsigned long prev_page; /* Cache last read() position */
unsigned long prev_index; /* Cache last read() position */
unsigned long ahead_start; /* Ahead window */
unsigned long ahead_size;
unsigned long ra_pages; /* Maximum readahead window */
unsigned long mmap_hit; /* Cache hit stat for mmap accesses */
unsigned long mmap_miss; /* Cache miss stat for mmap accesses */
unsigned int offset; /* Offset where last read() ended in a page */
unsigned int prev_offset; /* Offset where last read() ended in a page */
};
#define RA_FLAG_MISS 0x01 /* a cache miss occured against this file */
#define RA_FLAG_INCACHE 0x02 /* file is already in cache */