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Message-Id: <20201123203445.5491-1-alx.manpages@gmail.com>
Date: Mon, 23 Nov 2020 21:34:46 +0100
From: Alejandro Colomar <alx.manpages@...il.com>
To: mtk.manpages@...il.com
Cc: Alejandro Colomar <alx.manpages@...il.com>,
linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
libc-alpha@...rceware.org
Subject: [PATCH] restart_syscall.2: SYNOPSIS: Fix restart_syscall() return type
The Linux kernel uses 'long' instead of 'int' for the return type.
As glibc provides no wrapper, use the same types the kernel uses.
$ grep -rn 'SYSCALL_DEFINE.*(restart_syscall'
kernel/signal.c:2891:SYSCALL_DEFINE0(restart_syscall)
$ sed -n 2891,2895p kernel/signal.c
SYSCALL_DEFINE0(restart_syscall)
{
struct restart_block *restart = ¤t->restart_block;
return restart->fn(restart);
}
$ grep -rn 'struct restart_block {'
include/linux/restart_block.h:25:struct restart_block {
$ sed -n 25,56p include/linux/restart_block.h
struct restart_block {
long (*fn)(struct restart_block *);
union {
/* For futex_wait and futex_wait_requeue_pi */
struct {
u32 __user *uaddr;
u32 val;
u32 flags;
u32 bitset;
u64 time;
u32 __user *uaddr2;
} futex;
/* For nanosleep */
struct {
clockid_t clockid;
enum timespec_type type;
union {
struct __kernel_timespec __user *rmtp;
struct old_timespec32 __user *compat_rmtp;
};
u64 expires;
} nanosleep;
/* For poll */
struct {
struct pollfd __user *ufds;
int nfds;
int has_timeout;
unsigned long tv_sec;
unsigned long tv_nsec;
} poll;
};
};
Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
man2/restart_syscall.2 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man2/restart_syscall.2 b/man2/restart_syscall.2
index e7d96bd4d..21cc2df1d 100644
--- a/man2/restart_syscall.2
+++ b/man2/restart_syscall.2
@@ -34,7 +34,7 @@
.SH NAME
restart_syscall \- restart a system call after interruption by a stop signal
.SH SYNOPSIS
-.B int restart_syscall(void);
+.B long restart_syscall(void);
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
--
2.29.2
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