| Date | Fri, 18 Jun 2021 16:19:05 +0200 | From | Thomas Gleixner <> | Subject | [patch V3 42/66] x86/pkru: Provide pkru_get_init_value() |
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When CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS is disabled then the following code fails to compile:
if (cpu_feature_enabled(X86_FEATURE_OSPKE)) { u32 pkru = READ_ONCE(init_pkru_value); .. }
because init_pkru_value is defined as '0' which makes READ_ONCE() upset.
Provide an accessor macro to avoid #ifdeffery all over the place.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/include/asm/pkru.h | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/x86/include/asm/pkru.h +++ b/arch/x86/include/asm/pkru.h @@ -10,8 +10,10 @@ #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS extern u32 init_pkru_value; +#define pkru_get_init_value() READ_ONCE(init_pkru_value) #else #define init_pkru_value 0 +#define pkru_get_init_value() 0 #endif static inline bool __pkru_allows_read(u32 pkru, u16 pkey)
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