From 3ee2a19908f27b8fea8ff14ffa8b755585eb7b4a Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Fri, 17 Nov 2017 15:26:49 -0800 Subject: 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/util.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 fs/proc/util.c (limited to 'fs/proc/util.c') 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 + +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; +} -- cgit v1.2.3-59-g8ed1b