The patch titled
i386: arch/x86/math-emu/reg_ld_str.c: fix warning
has been removed from the -mm tree. Its filename was
i386-arch-x86-math-emu-reg_ld_strc-fix-warning.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: i386: arch/x86/math-emu/reg_ld_str.c: fix warning
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
arch/x86/math-emu/reg_ld_str.c: In function 'FPU_store_double':
arch/x86/math-emu/reg_ld_str.c:380: warning: 'l[0]' may be used uninitialized in this function
arch/x86/math-emu/reg_ld_str.c:380: warning: 'l[1]' may be used uninitialized in this function
I can't actually spot the bug here. There's one obvious place, but fixing
that didn't shut the warning up.
Probably a -mm-only patch until someone works out what's going on.
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/math-emu/reg_ld_str.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff -puN arch/x86/math-emu/reg_ld_str.c~i386-arch-x86-math-emu-reg_ld_strc-fix-warning arch/x86/math-emu/reg_ld_str.c
--- a/arch/x86/math-emu/reg_ld_str.c~i386-arch-x86-math-emu-reg_ld_strc-fix-warning
+++ a/arch/x86/math-emu/reg_ld_str.c
@@ -383,15 +383,15 @@ int FPU_store_double(FPU_REG *st0_ptr, u
int exp;
FPU_REG tmp;
+ l[0] = 0;
+ l[1] = 0;
if (st0_tag == TAG_Valid) {
reg_copy(st0_ptr, &tmp);
exp = exponent(&tmp);
if (exp < DOUBLE_Emin) { /* It may be a denormal */
addexponent(&tmp, -DOUBLE_Emin + 52); /* largest exp to be 51 */
-
- denormal_arg:
-
+denormal_arg:
if ((precision_loss = FPU_round_to_int(&tmp, st0_tag))) {
#ifdef PECULIAR_486
/* Did it round to a non-denormal ? */
@@ -477,8 +477,7 @@ int FPU_store_double(FPU_REG *st0_ptr, u
/* This is a special case: see sec 16.2.5.1 of the 80486 book */
/* Overflow to infinity */
- l[0] = 0x00000000; /* Set to */
- l[1] = 0x7ff00000; /* + INF */
+ l[1] = 0x7ff00000; /* Set to + INF */
} else {
if (precision_loss) {
if (increment)
@@ -492,8 +491,6 @@ int FPU_store_double(FPU_REG *st0_ptr, u
}
} else if (st0_tag == TAG_Zero) {
/* Number is zero */
- l[0] = 0;
- l[1] = 0;
} else if (st0_tag == TAG_Special) {
st0_tag = FPU_Special(st0_ptr);
if (st0_tag == TW_Denormal) {
@@ -508,7 +505,6 @@ int FPU_store_double(FPU_REG *st0_ptr, u
reg_copy(st0_ptr, &tmp);
goto denormal_arg;
} else if (st0_tag == TW_Infinity) {
- l[0] = 0;
l[1] = 0x7ff00000;
} else if (st0_tag == TW_NaN) {
/* Is it really a NaN ? */
@@ -532,7 +528,6 @@ int FPU_store_double(FPU_REG *st0_ptr, u
EXCEPTION(EX_Invalid);
if (!(control_word & CW_Invalid))
return 0;
- l[0] = 0;
l[1] = 0xfff80000;
}
}
_
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