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bh=IAvUFE7lU0hfrA0xX53hBwdwJ5A5zHNHOTouRYE10ds=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=KH/tJ+lzfhKgJm8bf19uF16EP9biO/chytOMgKvgtrIP0JKq/4goIFiPICogw/FQt 7idXikc+sDE/POmZh/X6hHMdvrGYUvOL3aO2wSxoyk9fCIrOIU5ojazdYTS+zNliu7 Vxc75n7utOWw28s0JGD19zQ7n2s+w9kekzxb9xCbow41rnw94ufs2djedJ8XcZ8PAX FOx0nTqd5dV2JVZoKc5sf0wRTIupKZZ7v7k7LJsoPa1dY+C2eMyq+0BNwIi1+XgIa8 +9OKjFAT2/XXvQmBYea527sWuS1WZF+8iMvoLtAm+qy/LPknN/ScKKI/0QyxmMckBO dxLAL9V7/lPZQ== Message-ID: Subject: Re: [PATCH] filelock: ignore 'lock' argument to for_each_file_lock() From: Jeff Layton To: Arnd Bergmann , NeilBrown , Christian Brauner Cc: Arnd Bergmann , Luca Vizzarro , Tom Talpey , linux-kernel@vger.kernel.org Date: Mon, 12 Feb 2024 07:08:28 -0500 In-Reply-To: <20240212112620.1272058-1-arnd@kernel.org> References: <20240212112620.1272058-1-arnd@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; 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kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 (3.50.3-1.fc39) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2024-02-12 at 12:26 +0100, Arnd Bergmann wrote: > From: Arnd Bergmann >=20 > When CONFIG_FILE_LOCKING is disabled, ceph causes a warning about > a variable that is only used insode of the for_each_file_lock() > loop: >=20 > fs/ceph/locks.c: In function 'ceph_count_locks': > fs/ceph/locks.c:380:27: error: unused variable 'lock' [-Werror=3Dunused-v= ariable] > 380 | struct file_lock *lock; >=20 > Rather than working around this in ceph, change the macro definition > to still contain a reference to the variable in order to shut up the > warning. >=20 > Fixes: 75cabec0111b ("filelock: add some new helper functions") > Signed-off-by: Arnd Bergmann > --- > include/linux/filelock.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) >=20 > diff --git a/include/linux/filelock.h b/include/linux/filelock.h > index aabd4bdf7eba..69290173280a 100644 > --- a/include/linux/filelock.h > +++ b/include/linux/filelock.h > @@ -283,7 +283,7 @@ static inline void locks_wake_up(struct file_lock *fl= ) > { > } > =20 > -#define for_each_file_lock(_fl, _head) while(false) > +#define for_each_file_lock(_fl, _head) while((void)_fl, false) > =20 > static inline void > locks_free_lock_context(struct inode *inode) I had sent a patch early last week for this, but then dropped the ball on following up. The simpler fix is to just unconditionally define for_each_file_lock(). It's a macro, so we can just move the "real" definition outside of the #ifdef. I'll spin up a patch later today and resend it. Thanks, --=20 Jeff Layton