linux-stable/include/linux/pkeys.h
Dave Jones 496063426d pkeys: Remove easily triggered WARN
This easy-to-trigger warning shows up instantly when running
Trinity on a kernel with CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS disabled.

At most this should have been a printk, but the -EINVAL alone should be more
than adequate indicator that something isn't available.

Signed-off-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-14 11:36:59 -07:00

43 lines
877 B
C

#ifndef _LINUX_PKEYS_H
#define _LINUX_PKEYS_H
#include <linux/mm_types.h>
#include <asm/mmu_context.h>
#ifdef CONFIG_ARCH_HAS_PKEYS
#include <asm/pkeys.h>
#else /* ! CONFIG_ARCH_HAS_PKEYS */
#define arch_max_pkey() (1)
#define execute_only_pkey(mm) (0)
#define arch_override_mprotect_pkey(vma, prot, pkey) (0)
#define PKEY_DEDICATED_EXECUTE_ONLY 0
#define ARCH_VM_PKEY_FLAGS 0
static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
{
return (pkey == 0);
}
static inline int mm_pkey_alloc(struct mm_struct *mm)
{
return -1;
}
static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
{
return -EINVAL;
}
static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
unsigned long init_val)
{
return 0;
}
static inline void copy_init_pkru_to_fpregs(void)
{
}
#endif /* ! CONFIG_ARCH_HAS_PKEYS */
#endif /* _LINUX_PKEYS_H */