kstrtox: uninline everything
authorAlexey Dobriyan <adobriyan@gmail.com>
Thu, 20 Jan 2022 02:08:53 +0000 (18:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 20 Jan 2022 06:52:53 +0000 (08:52 +0200)
commit70ac69928e9717a313a4c72647ebe80663e397a3
tree538a2bfeb2b815a3c903ac238ac3c279aa11761a
parent26d98e9f78da8e49413b1cb6bcd0d63ac03b8c85
kstrtox: uninline everything

I've made a mistake of looking into lib/kstrtox.o code generation.

The only function remotely performance critical is _parse_integer()
(via /proc/*/map_files/*), everything else is not.

Uninline everything, shrink lib/kstrtox.o by ~20 % !

Space savings on x86_64:

add/remove: 0/0 grow/shrink: 0/23 up/down: 0/-1269 (-1269 !!!)
Function                                     old     new   delta
kstrtoull                                     16      13      -3
kstrtouint                                    59      48     -11
kstrtou8                                      60      49     -11
kstrtou16                                     61      50     -11
_kstrtoul                                     46      35     -11
kstrtoull_from_user                           95      83     -12
kstrtoul_from_user                            95      83     -12
kstrtoll                                      93      80     -13
kstrtouint_from_user                         124      83     -41
kstrtou8_from_user                           125      83     -42
kstrtou16_from_user                          126      83     -43
kstrtos8                                     101      50     -51
kstrtos16                                    102      51     -51
kstrtoint                                    100      49     -51
_kstrtol                                      93      35     -58
kstrtobool_from_user                         156      75     -81
kstrtoll_from_user                           165      83     -82
kstrtol_from_user                            165      83     -82
kstrtoint_from_user                          172      83     -89
kstrtos8_from_user                           173      83     -90
kstrtos16_from_user                          174      83     -91
_parse_integer                               136      10    -126
_kstrtoull                                   308     101    -207
Total: Before=3421236, After=3419967, chg -0.04%

Link: https://lkml.kernel.org/r/YZDsFDhHst4m2Pnt@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/kstrtox.c