Cregit: Linux 6.16: getrandom.h

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Heiko Carstens	61	85.92%	2	33.33%
Sven Schnelle	5	7.04%	1	16.67%
Linus Torvalds (pre-git)	3	4.23%	2	33.33%
Martin Schwidefsky	2	2.82%	1	16.67%
Total	71		6

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __ASM_VDSO_GETRANDOM_H
#define __ASM_VDSO_GETRANDOM_H

#ifndef __ASSEMBLY__

#include <vdso/datapage.h>
#include <asm/vdso/vsyscall.h>
#include <asm/syscall.h>
#include <asm/unistd.h>
#include <asm/page.h>

/**
 * getrandom_syscall - Invoke the getrandom() syscall.
 * @buffer:	Destination buffer to fill with random bytes.
 * @len:	Size of @buffer in bytes.
 * @flags:	Zero or more GRND_* flags.
 * Returns:	The number of random bytes written to @buffer, or a negative value indicating an error.
 */
static __always_inline ssize_t getrandom_syscall(void *buffer, size_t len, unsigned int flags)
{
	return syscall3(__NR_getrandom, (long)buffer, (long)len, (long)flags);
}

#endif /* !__ASSEMBLY__ */

#endif /* __ASM_VDSO_GETRANDOM_H */