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Wong" Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org, Ard Biesheuvel Subject: Re: [PATCH v3 15/18] ext4: switch to using the crc32c library Message-ID: <20241104174839.GA1049313@google.com> References: <20241103223154.136127-1-ebiggers@kernel.org> <20241103223154.136127-16-ebiggers@kernel.org> <20241104155900.GH21832@frogsfrogsfrogs> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241104155900.GH21832@frogsfrogsfrogs> On Mon, Nov 04, 2024 at 07:59:00AM -0800, Darrick J. Wong wrote: > Hmm. Looking at your git branch (which was quite helpful to link to!) I > think for XFS we don't need to change the crc32c() calls, and the only > porting work that needs to be done is mirroring this Kconfig change? > And that doesn't even need to be done until someone wants to get rid of > CONFIG_LIBCRC32C, right? That's correct, no porting work is required now. 'select LIBCRC32C' should be replaced with 'select CRC32', but that can be done later. > > @@ -3278,15 +3263,11 @@ extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, > > extern int ext4_register_li_request(struct super_block *sb, > > ext4_group_t first_not_zeroed); > > > > static inline int ext4_has_metadata_csum(struct super_block *sb) > > { > > - WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && > > - !EXT4_SB(sb)->s_chksum_driver); > > - > > - return ext4_has_feature_metadata_csum(sb) && > > - (EXT4_SB(sb)->s_chksum_driver != NULL); > > + return ext4_has_feature_metadata_csum(sb); > > } > > Nit: Someone might want to > s/ext4_has_metadata_csum/ext4_has_feature_metadata_csum/ here to get rid > of the confusingly named trivial helper. > Yes, that should be done as a follow-up patch. > Otherwise this logic looks ok to me, so > Reviewed-by: Darrick J. Wong > > --D Thanks, - Eric