On Wed, Sep 21, 2016 at 12:17:37PM -0400, Jeff Mahoney wrote: > We can hit unused variable warnings when btrfs_debug and friends are > just aliases for no_printk. This is due to the fs_info not getting > consumed by the function call, which can happen if convenenience > variables are used. This patch adds a new btrfs_no_printk static inline > that consumes the convenience variable and does nothing else. It > silences the unused variable warning and has no impact on the generated > code: > > $ size fs/btrfs/extent_io.o* > text data bss dec hex filename > 44072 152 32 44256 ace0 > fs/btrfs/extent_io.o.btrfs_no_printk > 44072 152 32 44256 ace0 fs/btrfs/extent_io.o.no_printk > > Fixes: 27a0dd61a5 (Btrfs: make btrfs_debug match pr_debug handling related to > DEBUG) > Signed-off-by: Jeff Mahoney <je...@suse.com>
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