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linux/fs/btrfs/messages.c
Filipe Manana 7801f3ea95 btrfs: tag as unlikely if statements that check for fs in error state 
Having the filesystem in an error state, meaning we had a transaction
abort, is unexpected. Mark every check for the error state with the
unlikely annotation to convey that and to allow the compiler to generate
better code.

On x86_64, using gcc 14.2.0-19 from Debian, resulted in a slightly
reduced object size and better code.

Before:

  $ size fs/btrfs/btrfs.ko
     text	   data	    bss	    dec	    hex	filename
  2008598	 175912	  15592	2200102	 219226	fs/btrfs/btrfs.ko

After:

  $ size fs/btrfs/btrfs.ko
     text	   data	    bss	    dec	    hex	filename
  2008450	 175912	  15592	2199954	 219192	fs/btrfs/btrfs.ko

Reviewed-by: Anand Jain <asj@kernel.org>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2026-04-07 19:41:42 +02:00

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