From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E0F6270054 for ; Thu, 27 Feb 2025 21:31:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740691871; cv=none; b=dfyEPJsz5BO0EcRo7jih6TM767+Tpyz1Gat7UN1AP4nbd69LL8aDBv1qHArC7iMBLwu9Bzi49i1+p670f00IooqQAhIg/kwx/fxqOL/7oR76hOS7PRyVDW2e+hl6cOPc67kRp8eLIvLZUQM4qUrWMCxgnt224TrlFPcnneZFhqg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740691871; c=relaxed/simple; bh=Uex2exXxw8sF1aGanevdICvCrEBztUODkzUSVwWbgfE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=vCjFahE7bOfYqLFlByNoB1d42ZAQe61I48z/91v6KKHiY7f0Z/PX1otps4LRQXF3eSAWBUgnXNnum3Jny9XrS6EZye0Lh1VWAue0vmTFC8PPhGwmirqpzQJl6HoEJWJ0h0F/VtSHPR5c6yYbJKTtC4LFuSx3b9NV4Cl3HnXR6WE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kyMxHtaY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kyMxHtaY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76740C4CEDD; Thu, 27 Feb 2025 21:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740691870; bh=Uex2exXxw8sF1aGanevdICvCrEBztUODkzUSVwWbgfE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=kyMxHtaYNfUw+Wnf7dmzPePMLnz/klDd+UjLGFIZKBumQ8CSYJL95PkR7wKyXyvav k3XHNKLiSKrmoBxcsE9xjByQCkOVN6LgDy5FoRN+HyzzinURFusWOwQu3V6RaC75GB /kafT7gSLJeEBtALaTcpr7PcIM+TY/8HyWxOzyhwFoyn0yk0Hpp+80PhOlbq45ykTD hQfyR2ydu7IzOfiVUZnWkG2qqxLMnsau9mkua1IE3vPYl1tzXq4ITCnU9wbPm2HGLm hlru3JMKACjnHtBQoDqUK9sJNYchjj0sr14L2V1b/9QgbCGgAs9Sp7g0P8Zl7bHJ8T XNhyPU+35kUrg== Date: Thu, 27 Feb 2025 21:31:08 +0000 From: Jaegeuk Kim To: "Matthew Wilcox (Oracle)" Cc: Chao Yu , linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH 03/27] f2fs: Add f2fs_folio_put() Message-ID: References: <20250218055203.591403-1-willy@infradead.org> <20250218055203.591403-4-willy@infradead.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On 02/24, Jaegeuk Kim wrote: > Hi Matthew, > > On 02/21, Jaegeuk Kim wrote: > > On 02/18, Matthew Wilcox (Oracle) wrote: > > > Convert f2fs_put_page() to f2fs_folio_put() and add a wrapper. > > > Replaces three calls to compound_head() with one. > > > > > > Signed-off-by: Matthew Wilcox (Oracle) > > > --- > > > fs/f2fs/f2fs.h | 15 ++++++++++----- > > > 1 file changed, 10 insertions(+), 5 deletions(-) > > > > > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > > > index b05653f196dd..5e01a08afbd7 100644 > > > --- a/fs/f2fs/f2fs.h > > > +++ b/fs/f2fs/f2fs.h > > > @@ -2806,16 +2806,21 @@ static inline struct page *f2fs_pagecache_get_page( > > > return pagecache_get_page(mapping, index, fgp_flags, gfp_mask); > > > } > > > > > > -static inline void f2fs_put_page(struct page *page, int unlock) > > > +static inline void f2fs_folio_put(struct folio *folio, bool unlock) > > > { > > > - if (!page) > > > + if (!folio) > > > return; > > > > > > if (unlock) { > > > - f2fs_bug_on(F2FS_P_SB(page), !PageLocked(page)); > > > - unlock_page(page); > > > + f2fs_bug_on(F2FS_F_SB(folio), !folio_test_locked(folio)); > > > + folio_unlock(folio); > > > } > > > - put_page(page); > > > + folio_put(folio); > > > +} > > > + > > > +static inline void f2fs_put_page(struct page *page, int unlock) > > > +{ > > > > I got a kernel panic, since there are still several places to pass a null > > page pointer, which feeds to page_folio() which doesn't expect the null. > > > > Applying this can avoid the panic. > > > > if (!page) > > return; > > Please let me know, if you want me to apply this to your patch directly, or post > v2. I applied the fix into your patch. Thanks. > > Thanks, > > > > > > + f2fs_folio_put(page_folio(page), unlock); > > > } > > > > > > static inline void f2fs_put_dnode(struct dnode_of_data *dn) > > > -- > > > 2.47.2 > > >