The name 'xstate_features' does not tell us whether it's a bitmap
or any other value. That it's a count of features is only obvious
if you read the code that calculates it.
Rename it to the more descriptive 'xfeatures_nr' name.
Reviewed-by: Borislav Petkov <b...@alien8.de>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Fenghua Yu <fenghua...@intel.com>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/x86/kernel/fpu/xsave.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c
index c0e95538d689..1d0e27128f18 100644
--- a/arch/x86/kernel/fpu/xsave.c
+++ b/arch/x86/kernel/fpu/xsave.c
@@ -25,7 +25,9 @@ struct xsave_struct *init_xstate_buf;
static struct _fpx_sw_bytes fx_sw_reserved, fx_sw_reserved_ia32;
static unsigned int *xstate_offsets, *xstate_sizes;
static unsigned int xstate_comp_offsets[sizeof(xfeatures_mask)*8];
-static unsigned int xstate_features;
+
+/* The number of supported xfeatures in xfeatures_mask: */
+static unsigned int xfeatures_nr;
/*
* If a processor implementation discern that a processor state component is
@@ -465,9 +467,9 @@ static void __init setup_xstate_features(void)
{
int eax, ebx, ecx, edx, leaf = 0x2;
- xstate_features = fls64(xfeatures_mask);
- xstate_offsets = alloc_bootmem(xstate_features * sizeof(int));
- xstate_sizes = alloc_bootmem(xstate_features * sizeof(int));
+ xfeatures_nr = fls64(xfeatures_mask);
+ xstate_offsets = alloc_bootmem(xfeatures_nr * sizeof(int));
+ xstate_sizes = alloc_bootmem(xfeatures_nr * sizeof(int));
do {
cpuid_count(XSTATE_CPUID, leaf, &eax, &ebx, &ecx, &edx);
@@ -528,7 +530,7 @@ void setup_xstate_comp(void)
xstate_comp_offsets[1] = offsetof(struct i387_fxsave_struct, xmm_space);
if (!cpu_has_xsaves) {
- for (i = 2; i < xstate_features; i++) {
+ for (i = 2; i < xfeatures_nr; i++) {
if (test_bit(i, (unsigned long *)&xfeatures_mask)) {
xstate_comp_offsets[i] = xstate_offsets[i];
xstate_comp_sizes[i] = xstate_sizes[i];
@@ -539,7 +541,7 @@ void setup_xstate_comp(void)
xstate_comp_offsets[2] = FXSAVE_SIZE + XSAVE_HDR_SIZE;
- for (i = 2; i < xstate_features; i++) {
+ for (i = 2; i < xfeatures_nr; i++) {
if (test_bit(i, (unsigned long *)&xfeatures_mask))
xstate_comp_sizes[i] = xstate_sizes[i];
else
--
2.1.0
--
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