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-rw-r--r--fs/mpage.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/fs/mpage.c b/fs/mpage.c
index 5df564366f36..235e4d3873a8 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -325,16 +325,12 @@ confused:
325} 325}
326 326
327/** 327/**
328 * mpage_readpages - populate an address space with some pages, and 328 * mpage_readpages - populate an address space with some pages & start reads against them
329 * start reads against them.
330 *
331 * @mapping: the address_space 329 * @mapping: the address_space
332 * @pages: The address of a list_head which contains the target pages. These 330 * @pages: The address of a list_head which contains the target pages. These
333 * pages have their ->index populated and are otherwise uninitialised. 331 * pages have their ->index populated and are otherwise uninitialised.
334 *
335 * The page at @pages->prev has the lowest file offset, and reads should be 332 * The page at @pages->prev has the lowest file offset, and reads should be
336 * issued in @pages->prev to @pages->next order. 333 * issued in @pages->prev to @pages->next order.
337 *
338 * @nr_pages: The number of pages at *@pages 334 * @nr_pages: The number of pages at *@pages
339 * @get_block: The filesystem's block mapper function. 335 * @get_block: The filesystem's block mapper function.
340 * 336 *
@@ -360,6 +356,7 @@ confused:
360 * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be 356 * So an mpage read of the first 16 blocks of an ext2 file will cause I/O to be
361 * submitted in the following order: 357 * submitted in the following order:
362 * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 358 * 12 0 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16
359 *
363 * because the indirect block has to be read to get the mappings of blocks 360 * because the indirect block has to be read to get the mappings of blocks
364 * 13,14,15,16. Obviously, this impacts performance. 361 * 13,14,15,16. Obviously, this impacts performance.
365 * 362 *
@@ -656,9 +653,7 @@ out:
656} 653}
657 654
658/** 655/**
659 * mpage_writepages - walk the list of dirty pages of the given 656 * mpage_writepages - walk the list of dirty pages of the given address space & writepage() all of them
660 * address space and writepage() all of them.
661 *
662 * @mapping: address space structure to write 657 * @mapping: address space structure to write
663 * @wbc: subtract the number of written pages from *@wbc->nr_to_write 658 * @wbc: subtract the number of written pages from *@wbc->nr_to_write
664 * @get_block: the filesystem's block mapper function. 659 * @get_block: the filesystem's block mapper function.