linux-kernel - [PATCH 6/9] nilfs2: fix out-of-range warning

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Date: Thu, 28 Mar 2024 15:30:44 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: linux-kernel@...r.kernel.org,
	Ryusuke Konishi <konishi.ryusuke@...il.com>,
	Nathan Chancellor <nathan@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Philipp Stanner <pstanner@...hat.com>,
	Christian Brauner <brauner@...nel.org>,
	Jeff Layton <jlayton@...nel.org>,
	Thorsten Blum <thorsten.blum@...lux.com>,
	linux-nilfs@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH 6/9] nilfs2: fix out-of-range warning

From: Arnd Bergmann <arnd@...db.de>

clang-14 points out that v_size is always smaller than a 64KB
page size if that is configured by the CPU architecture:

fs/nilfs2/ioctl.c:63:19: error: result of comparison of constant 65536 with expression of type '__u16' (aka 'unsigned short') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
        if (argv->v_size > PAGE_SIZE)
            ~~~~~~~~~~~~ ^ ~~~~~~~~~

This is ok, so just shut up that warning with a cast.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 fs/nilfs2/ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index f1a01c191cf5..8be471ce4f19 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -60,7 +60,7 @@ static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
 	if (argv->v_nmembs == 0)
 		return 0;
 
-	if (argv->v_size > PAGE_SIZE)
+	if ((size_t)argv->v_size > PAGE_SIZE)
 		return -EINVAL;
 
 	/*
-- 
2.39.2