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authorBorislav Petkov (AMD) <bp@alien8.de>2026-06-19 18:50:41 -0700
committerBorislav Petkov (AMD) <bp@alien8.de>2026-07-06 21:34:26 -0700
commit3eaa50e1e255ec261c757b9eea811ef3bac10d1e (patch)
treebf0083c895d6cfce97f943096f426ff600eda42a /arch/um/include
parent8cdeaa50eae8dad34885515f62559ee83e7e8dda (diff)
downloadlinux-next-3eaa50e1e255ec261c757b9eea811ef3bac10d1e.tar.gz
linux-next-3eaa50e1e255ec261c757b9eea811ef3bac10d1e.zip
x86/cpu: Hide and rename static_cpu_has()
cpu_feature_enabled() is the one to use to test feature flags so hide the static thing which doesn't pay attention to disabled mask bits anyway. Use the following command to do the replacement: $ git grep --files-with-matches -w static_cpu_has -- ':(exclude)*cpufeature.h' \ | xargs sed -i 's/static_cpu_has(/cpu_feature_enabled\(/g' There should be no functional changes resulting from this. Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Nikolay Borisov <nik.borisov@suse.com> Link: https://patch.msgid.link/20260620015041.336288-1-bp@kernel.org
Diffstat (limited to 'arch/um/include')
-rw-r--r--arch/um/include/asm/cpufeature.h16
1 files changed, 4 insertions, 12 deletions
diff --git a/arch/um/include/asm/cpufeature.h b/arch/um/include/asm/cpufeature.h
index 4354f6984271..f7770083c0a4 100644
--- a/arch/um/include/asm/cpufeature.h
+++ b/arch/um/include/asm/cpufeature.h
@@ -49,7 +49,7 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
* is not relevant.
*/
#define cpu_feature_enabled(bit) \
- (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 : static_cpu_has(bit))
+ (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 : _static_cpu_has(bit))
#define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit)
@@ -64,15 +64,7 @@ extern void setup_clear_cpu_cap(unsigned int bit);
#define setup_force_cpu_bug(bit) setup_force_cpu_cap(bit)
-/*
- * Static testing of CPU features. Used the same as boot_cpu_has(). It
- * statically patches the target code for additional performance. Use
- * static_cpu_has() only in fast paths, where every cycle counts. Which
- * means that the boot_cpu_has() variant is already fast enough for the
- * majority of cases and you should stick to using it as it is generally
- * only two instructions: a RIP-relative MOV and a TEST.
- */
-static __always_inline bool _static_cpu_has(u16 bit)
+static __always_inline bool __static_cpu_has(u16 bit)
{
asm goto("1: jmp 6f\n"
"2:\n"
@@ -116,7 +108,7 @@ t_no:
return false;
}
-#define static_cpu_has(bit) \
+#define _static_cpu_has(bit) \
( \
__builtin_constant_p(boot_cpu_has(bit)) ? \
boot_cpu_has(bit) : \
@@ -126,7 +118,7 @@ t_no:
#define cpu_has_bug(c, bit) cpu_has(c, (bit))
#define set_cpu_bug(c, bit) set_cpu_cap(c, (bit))
-#define static_cpu_has_bug(bit) static_cpu_has((bit))
+#define static_cpu_has_bug(bit) _static_cpu_has((bit))
#define boot_cpu_has_bug(bit) cpu_has_bug(&boot_cpu_data, (bit))
#define boot_cpu_set_bug(bit) set_cpu_cap(&boot_cpu_data, (bit))