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Date:   Tue, 07 Mar 2023 14:08:45 -0800
To:     mm-commits@vger.kernel.org, masahiroy@kernel.org,
        kernel@xen0n.name, chenhuacai@kernel.org, arnd@arndb.de,
        yangtiezhu@loongson.cn, akpm@linux-foundation.org
From:   Andrew Morton <akpm@linux-foundation.org>
Subject: + checksyscalls-ignore-fstat-to-silence-build-warning-on-loongarch.patch added to mm-hotfixes-unstable branch
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The patch titled
     Subject: checksyscalls: ignore fstat to silence build warning on LoongArch
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     checksyscalls-ignore-fstat-to-silence-build-warning-on-loongarch.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/checksyscalls-ignore-fstat-to-silence-build-warning-on-loongarch.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Subject: checksyscalls: ignore fstat to silence build warning on LoongArch
Date: Tue, 7 Mar 2023 15:59:00 +0800

fstat is replaced by statx on the new architecture, so an exception is
added to the checksyscalls script to silence the following build warning
on LoongArch:

  CALL    scripts/checksyscalls.sh
<stdin>:569:2: warning: #warning syscall fstat not implemented [-Wcpp]

Link: https://lkml.kernel.org/r/1678175940-20872-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Suggested-by: WANG Xuerui <kernel@xen0n.name>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 scripts/checksyscalls.sh |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/scripts/checksyscalls.sh~checksyscalls-ignore-fstat-to-silence-build-warning-on-loongarch
+++ a/scripts/checksyscalls.sh
@@ -114,7 +114,6 @@ cat << EOF
 #define __IGNORE_truncate
 #define __IGNORE_stat
 #define __IGNORE_lstat
-#define __IGNORE_fstat
 #define __IGNORE_fcntl
 #define __IGNORE_fadvise64
 #define __IGNORE_newfstatat
@@ -255,6 +254,9 @@ cat << EOF
 /* 64-bit ports never needed these, and new 32-bit ports can use statx */
 #define __IGNORE_fstat64
 #define __IGNORE_fstatat64
+
+/* Newer ports are not required to provide fstat in favor of statx */
+#define __IGNORE_fstat
 EOF
 }
 
_

Patches currently in -mm which might be from yangtiezhu@loongson.cn are

checksyscalls-ignore-fstat-to-silence-build-warning-on-loongarch.patch