From: Dave Chinner Date: Mon, 22 Jun 2015 00:04:31 +0000 (+1000) Subject: xfs: xfs_alloc_fix_freelist() can use incore perag structures X-Git-Tag: omap-for-v4.3/legacy-v2-signed~97^2~1^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50adbcb4c4e6c94b3acaad2a5854b6ca57402115;p=pandora-kernel.git xfs: xfs_alloc_fix_freelist() can use incore perag structures At the moment, xfs_alloc_fix_freelist() uses a mix of per-ag based access and agf buffer based access to freelist and space usage information. However, once the AGF buffer is locked inside this function, it is guaranteed that both the in-memory and on-disk values are identical. xfs_alloc_fix_freelist() doesn't modify the values in the structures directly, so it is a read-only user of the infomration, and hence can use the per-ag structure exclusively for determining what it should do. This opens up an avenue for cleaning up a lot of duplicated logic whose only difference is the structure it gets the data from, and in doing so removes a lot of needless byte swapping overhead when fixing up the free list. Signed-off-by: Dave Chinner Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- Reading git-diff-tree failed