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| author | Andrew Morton <akpm@osdl.org> | 2006-03-24 03:17:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-24 07:33:25 -0800 |
| commit | 469eb4d03878b676418f853011ebfb54ccf83a5e (patch) | |
| tree | 38b10385c6241778ca88c6015ded3ba68d39a23c /mm/filemap.c | |
| parent | 604bf5a216e7f2d97cdf62614ca1281921531040 (diff) | |
| download | linux-469eb4d03878b676418f853011ebfb54ccf83a5e.tar.gz linux-469eb4d03878b676418f853011ebfb54ccf83a5e.tar.bz2 linux-469eb4d03878b676418f853011ebfb54ccf83a5e.zip | |
[PATCH] filemap_fdatawrite_range() api: clarify -end parameter
I had trouble understanding working out whether filemap_fdatawrite_range()'s
`end' parameter describes the last-byte-to-be-written or the last-plus-one.
Clarify that in comments.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index d4ff48ec269e..c1b1708cc95d 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -175,7 +175,7 @@ static int sync_page(void *word) * dirty pages that lie within the byte offsets <start, end> * @mapping: address space structure to write * @start: offset in bytes where the range starts - * @end: offset in bytes where the range ends + * @end: offset in bytes where the range ends (inclusive) * @sync_mode: enable synchronous operation * * If sync_mode is WB_SYNC_ALL then this is a "data integrity" operation, as @@ -368,6 +368,12 @@ int filemap_write_and_wait(struct address_space *mapping) } EXPORT_SYMBOL(filemap_write_and_wait); +/* + * Write out and wait upon file offsets lstart->lend, inclusive. + * + * Note that `lend' is inclusive (describes the last byte to be written) so + * that this function can be used to write to the very end-of-file (end = -1). + */ int filemap_write_and_wait_range(struct address_space *mapping, loff_t lstart, loff_t lend) { |