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>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121455.404880646@linutronix.de
#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)