kernel-ark/include/linux/seccomp.h
Andrea Arcangeli cf99abace7 make seccomp zerocost in schedule
This follows a suggestion from Chuck Ebbert on how to make seccomp
absolutely zerocost in schedule too.  The only remaining footprint of
seccomp is in terms of the bzImage size that becomes a few bytes (perhaps
even a few kbytes) larger, measure it if you care in the embedded.

Signed-off-by: Andrea Arcangeli <andrea@cpushare.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:50 -07:00

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C

#ifndef _LINUX_SECCOMP_H
#define _LINUX_SECCOMP_H
#ifdef CONFIG_SECCOMP
#include <linux/thread_info.h>
#include <asm/seccomp.h>
typedef struct { int mode; } seccomp_t;
extern void __secure_computing(int);
static inline void secure_computing(int this_syscall)
{
if (unlikely(test_thread_flag(TIF_SECCOMP)))
__secure_computing(this_syscall);
}
extern long prctl_get_seccomp(void);
extern long prctl_set_seccomp(unsigned long);
#else /* CONFIG_SECCOMP */
typedef struct { } seccomp_t;
#define secure_computing(x) do { } while (0)
static inline long prctl_get_seccomp(void)
{
return -EINVAL;
}
static inline long prctl_set_seccomp(unsigned long arg2)
{
return -EINVAL;
}
#endif /* CONFIG_SECCOMP */
#endif /* _LINUX_SECCOMP_H */