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0746a0bc6e
Gcc doesn't know that "len" is guaranteed to be >=1 by dcache and generates standard while-loop prologue duplicating loop condition. add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-27 (-27) function old new delta name_to_int 104 77 -27 Link: http://lkml.kernel.org/r/20170912195213.GB17730@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>
23 lines
361 B
C
23 lines
361 B
C
#include <linux/dcache.h>
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unsigned name_to_int(const struct qstr *qstr)
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{
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const char *name = qstr->name;
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int len = qstr->len;
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unsigned n = 0;
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if (len > 1 && *name == '0')
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goto out;
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do {
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unsigned c = *name++ - '0';
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if (c > 9)
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goto out;
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if (n >= (~0U-9)/10)
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goto out;
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n *= 10;
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n += c;
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} while (--len > 0);
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return n;
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out:
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return ~0U;
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}
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