btrfs: use memdup_user()
Remove open-coded memdup_user(). Note this changes some GFP_NOFS to GFP_KERNEL, since copy_from_user() may cause pagefault, it's pointless to pass GFP_NOFS to kmalloc(). Signed-off-by:Li Zefan <lizf@cn.fujitsu.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
parent
3939fcde
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