linux-kernel - [PATCH] subpage_prot.2: SYNOPSIS: Fix return type: s/long/int/

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Date:   Sat, 28 Nov 2020 00:44:18 +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
Subject: [PATCH] subpage_prot.2: SYNOPSIS: Fix return type: s/long/int/

The Linux kernel uses 'int' instead of 'long' for the return type.
As glibc provides no wrapper, use the same type the kernel uses.

......

$ grep -n wrapper man-pages/man2/subpage_prot.2
40:There is no glibc wrapper for this system call; see NOTES.
99:Glibc does not provide a wrapper for this system call; call it using

$ grep -rn SYSCALL_DEFINE.*subpage_prot linux/;
linux/arch/powerpc/mm/book3s64/subpage_prot.c:190:
SYSCALL_DEFINE3(subpage_prot, unsigned long, addr,

$ sed -n /SYSCALL.*subpage_prot/,/^}/p \
  linux/arch/powerpc/mm/book3s64/subpage_prot.c \
  |grep return;
		return -ENOENT;
		return -EINVAL;
		return -EINVAL;
		return 0;
		return -EFAULT;
			return -EFAULT;
	return err;

$ sed -n /SYSCALL.*subpage_prot/,/^}/p \
  linux/arch/powerpc/mm/book3s64/subpage_prot.c \
  |grep '\<err\>';
	int err;
			err = -ENOMEM;
		err = -ENOMEM;
	err = 0;
	return err;

Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
 man2/subpage_prot.2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/man2/subpage_prot.2 b/man2/subpage_prot.2
index b38ba718f..d6f016665 100644
--- a/man2/subpage_prot.2
+++ b/man2/subpage_prot.2
@@ -32,7 +32,7 @@
 subpage_prot \- define a subpage protection for an address range
 .SH SYNOPSIS
 .nf
-.BI "long subpage_prot(unsigned long " addr ", unsigned long " len ,
+.BI "int subpage_prot(unsigned long " addr ", unsigned long " len ,
 .BI "                  uint32_t *" map );
 .fi
 .PP
-- 
2.29.2