btrfs: add 'cold' compiler annotations to all error handling functions

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The annotated functios will be placed into .text.unlikely section. The
annotation also hints compiler to move the code out of the hot paths,
and may implicitly mark if-statement leading to that block as unlikely.

This is a heuristic, the impact on the generated code is not
significant.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

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David Sterba 2015-04-24 19:11:57 +02:00 • committed by Chris Mason

parent 1a9a8a71ed

commit c0d19e2b9a

2 changed files with 7 additions and 0 deletions

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4

fs/btrfs/ctree.h

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3

fs/btrfs/super.c

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