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ceph: use calc_pages_for() in start_read()

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There's a spot that computes the number of pages to allocate for a
page-aligned length by just shifting it.  Use calc_pages_for()
instead, to be consistent with usage everywhere else.  The result
is the same.

The reason for this is to make it clearer in an upcoming patch that
this calculation is duplicated.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-03-01 18:00:15 -06:00 committed by Sage Weil
parent 54ae0756e3
commit cf7b7e1492
1 changed files with 1 additions and 1 deletions
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2
fs/ceph/addr.c
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@ -314,7 +314,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
return PTR_ERR(req);
/* build page vector */
nr_pages = len >> PAGE_CACHE_SHIFT;
nr_pages = calc_pages_for(0, len);
pages = kmalloc(sizeof(*pages) * nr_pages, GFP_NOFS);
ret = -ENOMEM;
if (!pages)