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authorAlexey Dobriyan <adobriyan@gmail.com>2017-11-17 15:26:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 16:10:00 -0800
commit3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a (patch)
tree4dc375234b65b25e1f8088691faad72f80a2cb5b /fs/proc/util.c
parentproc, coredump: add CoreDumping flag to /proc/pid/status (diff)
downloadlinux-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 'fs/proc/util.c')
-rw-r--r--fs/proc/util.c23
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;
+}