A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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don't put symlink bodies in pagecache into highmem

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kmap() in page_follow_link_light() needed to go - allowing to hold
an arbitrary number of kmaps for long is a great way to deadlocking
the system.

new helper (inode_nohighmem(inode)) needs to be used for pagecache
symlinks inodes; done for all in-tree cases.  page_follow_link_light()
instrumented to yell about anything missed.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2015-11-17 01:07:57 -05:00
commit 21fc61c73c
57 changed files with 81 additions and 46 deletions
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1
fs/ramfs/inode.c
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@ -79,6 +79,7 @@ struct inode *ramfs_get_inode(struct super_block *sb,
break;
case S_IFLNK:
inode->i_op = &page_symlink_inode_operations;
inode_nohighmem(inode);
break;
}
}