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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-02-12 15:01:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 18:54:13 -0800 |
| commit | 84b9fbedf54a6ea4fba62ef8a167138233586ad3 (patch) | |
| tree | 33e86741e9cab9ef7c66817ce54b3d0b49e36dc5 /lib | |
| parent | 7eed8fde021b4e169e325e5f50d9f12320668bf2 (diff) | |
| download | linux-84b9fbedf54a6ea4fba62ef8a167138233586ad3.tar.gz linux-84b9fbedf54a6ea4fba62ef8a167138233586ad3.tar.bz2 linux-84b9fbedf54a6ea4fba62ef8a167138233586ad3.zip | |
lib/string_helpers.c:string_get_size(): use 32 bit arithmetic when possible
The remainder from do_div is always a u32, and after size has been reduced
to be below 1000 (or 1024), it certainly fits in u32. So both remainder
and sf_cap can be made u32s, the format specifiers can be simplified (%lld
wasn't the right thing to use for _unsigned_ long long anyway), and we can
replace a do_div with an ordinary 32/32 bit division.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/string_helpers.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lib/string_helpers.c b/lib/string_helpers.c index 0d25f7aa732c..2b3757f84b3b 100644 --- a/lib/string_helpers.c +++ b/lib/string_helpers.c @@ -42,7 +42,7 @@ int string_get_size(u64 size, const enum string_size_units units, [STRING_UNITS_2] = 1024, }; int i, j; - u64 remainder = 0, sf_cap; + u32 remainder = 0, sf_cap; char tmp[8]; tmp[0] = '\0'; @@ -59,14 +59,13 @@ int string_get_size(u64 size, const enum string_size_units units, if (j) { remainder *= 1000; - do_div(remainder, divisor[units]); - snprintf(tmp, sizeof(tmp), ".%03lld", - (unsigned long long)remainder); + remainder /= divisor[units]; + snprintf(tmp, sizeof(tmp), ".%03u", remainder); tmp[j+1] = '\0'; } } - snprintf(buf, len, "%lld%s %s", (unsigned long long)size, + snprintf(buf, len, "%u%s %s", (u32)size, tmp, units_str[units][i]); return 0; |