diff options
| author |   Alexey Dobriyan <adobriyan@gmail.com> | 2017-11-17 15:26:49 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:10:00 -0800 |
| commit | 3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a (patch) | |
| tree | 4dc375234b65b25e1f8088691faad72f80a2cb5b /fs/proc/util.c | |
| parent | proc, coredump: add CoreDumping flag to /proc/pid/status (diff) | |
| download | linux-dev-3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a.tar.xz linux-dev-3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a.zip | |
proc: : uninline name_to_int()
Save ~360 bytes.
add/remove: 1/0 grow/shrink: 0/4 up/down: 104/-463 (-359)
function old new delta
name_to_int - 104 +104
proc_pid_lookup 217 126 -91
proc_lookupfd_common 212 121 -91
proc_task_lookup 289 194 -95
__proc_create 588 402 -186
Link: http://lkml.kernel.org/r/20170912194850.GA17730@avx2
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>
Diffstat (limited to '')
| -rw-r--r-- | fs/proc/util.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/proc/util.c b/fs/proc/util.c new file mode 100644 index 000000000000..c29aa497394b --- /dev/null +++ b/fs/proc/util.c @@ -0,0 +1,23 @@ +#include <linux/dcache.h> + +unsigned name_to_int(const struct qstr *qstr) +{ + const char *name = qstr->name; + int len = qstr->len; + unsigned n = 0; + + if (len > 1 && *name == '0') + goto out; + while (len-- > 0) { + unsigned c = *name++ - '0'; + if (c > 9) + goto out; + if (n >= (~0U-9)/10) + goto out; + n *= 10; + n += c; + } + return n; +out: + return ~0U; +} |