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x86/cpu/centaur: Replace two-condition switch-case with an if statement 

mainline inclusion
from mainline-v5.9-rc1
commit <8687bdc04128b2bd16faaae11db10128ad0da7b8>
category: feature

-------------------

Use a normal if statements instead of a two-condition switch-case.

 [ bp: Massage commit message. ]

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/1599562666-31351-2-git-send-email-TonyWWang-oc@zhaoxin.com

Signed-off-by: leoliu-oc <leoliu-oc@zhaoxin.com>
This commit is contained in:
leoliu-oc 2024-08-26 16:28:07 +08:00
parent adbb2ac925
commit 0e070b4bb8
1 changed files with 9 additions and 16 deletions
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25
arch/x86/kernel/cpu/centaur.c
View File

@ -96,18 +96,14 @@ enum {
static void early_init_centaur(struct cpuinfo_x86 *c)
{
switch (c->x86) {
#ifdef CONFIG_X86_32
case 5:
/* Emulate MTRRs using Centaur's MCR. */
/* Emulate MTRRs using Centaur's MCR. */
if (c->x86 == 5)
set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
break;
#endif
case 6:
if (c->x86_model >= 0xf)
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
break;
}
if (c->x86 == 6 && c->x86_model >= 0xf)
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
#ifdef CONFIG_X86_64
set_cpu_cap(c, X86_FEATURE_SYSENTER32);
#endif
@ -176,9 +172,8 @@ static void init_centaur(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
}
switch (c->x86) {
#ifdef CONFIG_X86_32
case 5:
if (c->x86 == 5) {
switch (c->x86_model) {
case 4:
name = "C6";
@ -238,12 +233,10 @@ static void init_centaur(struct cpuinfo_x86 *c)
c->x86_cache_size = (cc>>24)+(dd>>24);
}
sprintf(c->x86_model_id, "WinChip %s", name);
break;
#endif
case 6:
init_c3(c);
break;
}
#endif
if (c->x86 == 6)
init_c3(c);
#ifdef CONFIG_X86_64
set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
#endif