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mm, fs: introduce mapping_gfp_constraint()

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There are many places which use mapping_gfp_mask to restrict a more
generic gfp mask which would be used for allocations which are not
directly related to the page cache but they are performed in the same
context.

Let's introduce a helper function which makes the restriction explicit and
easier to track.  This patch doesn't introduce any functional changes.

[[email protected]: coding-style fixes]
Signed-off-by: Michal Hocko <[email protected]>
Suggested-by: Andrew Morton <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Michal Hocko 2015-11-06 16:28:49 -08:00 • committed by Linus Torvalds
commit c62d25556b
19 changed files with 36 additions and 30 deletions
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4
fs/nilfs2/inode.c
View file

@ -356,7 +356,7 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
@ -522,7 +522,7 @@ static int __nilfs_read_inode(struct super_block *sb,
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
nilfs_set_inode_flags(inode);
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
return 0;
failed_unmap: