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| author | Thomas Gleixner <tglx@linutronix.de> | 2018-01-27 17:45:14 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-27 17:45:14 +0300 |
| commit | e383095c7fe8d218e00ec0f83e4b95ed4e627b02 (patch) | |
| tree | ead1c52833edd880b4d81143d05486e3b5531083 /arch | |
| parent | 55fa19d3e51f33d9cd4056d25836d93abf9438db (diff) | |
| download | linux-e383095c7fe8d218e00ec0f83e4b95ed4e627b02.tar.xz | |
x86/cpu/bugs: Make retpoline module warning conditional
If sysfs is disabled and RETPOLINE not defined:
arch/x86/kernel/cpu/bugs.c:97:13: warning: ‘spectre_v2_bad_module’ defined but not used
[-Wunused-variable]
static bool spectre_v2_bad_module;
Hide it.
Fixes: caf7501a1b4e ("module/retpoline: Warn about missing retpoline in module")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/bugs.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index c988a8acb0d5..b0b7157df89e 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -94,9 +94,10 @@ static const char *spectre_v2_strings[] = { #define pr_fmt(fmt) "Spectre V2 : " fmt static enum spectre_v2_mitigation spectre_v2_enabled = SPECTRE_V2_NONE; -static bool spectre_v2_bad_module; #ifdef RETPOLINE +static bool spectre_v2_bad_module; + bool retpoline_module_ok(bool has_retpoline) { if (spectre_v2_enabled == SPECTRE_V2_NONE || has_retpoline) @@ -106,6 +107,13 @@ bool retpoline_module_ok(bool has_retpoline) spectre_v2_bad_module = true; return false; } + +static inline const char *spectre_v2_module_string(void) +{ + return spectre_v2_bad_module ? " - vulnerable module loaded" : ""; +} +#else +static inline const char *spectre_v2_module_string(void) { return ""; } #endif static void __init spec2_print_if_insecure(const char *reason) @@ -300,7 +308,7 @@ ssize_t cpu_show_spectre_v2(struct device *dev, return sprintf(buf, "Not affected\n"); return sprintf(buf, "%s%s%s\n", spectre_v2_strings[spectre_v2_enabled], - boot_cpu_has(X86_FEATURE_IBPB) ? ", IPBP" : "", - spectre_v2_bad_module ? " - vulnerable module loaded" : ""); + boot_cpu_has(X86_FEATURE_IBPB) ? ", IBPB" : "", + spectre_v2_module_string()); } #endif |