The patch titled
Subject: lib/vsprintf.c: eliminate duplicate hex string array
has been added to the -mm tree. Its filename is
lib-vsprintfc-eliminate-duplicate-hex-string-array.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-vsprintfc-eliminate-duplicate-hex-string-array.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-vsprintfc-eliminate-duplicate-hex-string-array.patch
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------------------------------------------------------
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Subject: lib/vsprintf.c: eliminate duplicate hex string array
gcc doesn't merge or overlap const char[] objects with identical contents
(probably language lawyers would also insist that these things have
different addresses), but there's no reason to have the string
"0123456789ABCDEF" occur in multiple places. hex_asc_upper is declared in
kernel.h and defined in lib/hexdump.c, which is unconditionally compiled
in.
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/vsprintf.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff -puN lib/vsprintf.c~lib-vsprintfc-eliminate-duplicate-hex-string-array lib/vsprintf.c
--- a/lib/vsprintf.c~lib-vsprintfc-eliminate-duplicate-hex-string-array
+++ a/lib/vsprintf.c
@@ -383,9 +383,6 @@ static noinline_for_stack
char *number(char *buf, char *end, unsigned long long num,
struct printf_spec spec)
{
- /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
- static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
-
char tmp[3 * sizeof(num)];
char sign;
char locase;
@@ -422,7 +419,7 @@ char *number(char *buf, char *end, unsig
/* generate full string in tmp[], in reverse order */
i = 0;
if (num < spec.base)
- tmp[i++] = digits[num] | locase;
+ tmp[i++] = hex_asc_upper[num] | locase;
else if (spec.base != 10) { /* 8 or 16 */
int mask = spec.base - 1;
int shift = 3;
@@ -430,7 +427,7 @@ char *number(char *buf, char *end, unsig
if (spec.base == 16)
shift = 4;
do {
- tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
+ tmp[i++] = (hex_asc_upper[((unsigned char)num) & mask] | locase);
num >>= shift;
} while (num);
} else { /* base 10 */
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxx are
lib-vsprintfc-eliminate-some-branches.patch
lib-vsprintfc-reduce-stack-use-in-number.patch
lib-vsprintfc-eliminate-duplicate-hex-string-array.patch
lib-vsprintfc-another-small-hack.patch
linux-bitmaph-improve-bitmap_lastfirst_word_mask.patch
rtc-mc13xxx-fix-obfuscated-and-wrong-format-string.patch
lib-lz4-pull-out-constant-tables.patch
linux-next.patch
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