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Peter Anvin" , Herbert Xu , Dan Williams , Chris Mason , David Sterba , Arnd Bergmann , Song Liu , Yu Kuai , Li Nan , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-arch@vger.kernel.org, linux-raid@vger.kernel.org Subject: [PATCH 10/17] raid6: use static_call for gen_syndrom and xor_syndrom Date: Tue, 24 Mar 2026 07:40:45 +0100 Message-ID: <20260324064115.3217136-11-hch@lst.de> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260324064115.3217136-1-hch@lst.de> References: <20260324064115.3217136-1-hch@lst.de> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Avoid indirect calls for P/Q parity generation. Signed-off-by: Christoph Hellwig --- lib/raid/raid6/algos.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/lib/raid/raid6/algos.c b/lib/raid/raid6/algos.c index f9e8a8752e2d..b81c7594f6c4 100644 --- a/lib/raid/raid6/algos.c +++ b/lib/raid/raid6/algos.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include "algos.h" @@ -23,7 +24,8 @@ static unsigned int raid6_nr_algos; static const struct raid6_recov_calls *raid6_recov_algo; /* Selected algorithm */ -static struct raid6_calls raid6_call; +DEFINE_STATIC_CALL_NULL(raid6_gen_syndrome_impl, *raid6_intx1.gen_syndrome); +DEFINE_STATIC_CALL_NULL(raid6_xor_syndrome_impl, *raid6_intx1.xor_syndrome); /** * raid6_gen_syndrome - generate RAID6 P/Q parity @@ -47,7 +49,7 @@ void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs) lockdep_assert_preemption_enabled(); WARN_ON_ONCE(bytes & 511); - raid6_call.gen_syndrome(disks, bytes, ptrs); + static_call(raid6_gen_syndrome_impl)(disks, bytes, ptrs); } EXPORT_SYMBOL_GPL(raid6_gen_syndrome); @@ -83,7 +85,7 @@ void raid6_xor_syndrome(int disks, int start, int stop, size_t bytes, WARN_ON_ONCE(bytes & 511); WARN_ON_ONCE(stop < start); - raid6_call.xor_syndrome(disks, start, stop, bytes, ptrs); + static_call(raid6_xor_syndrome_impl)(disks, start, stop, bytes, ptrs); } EXPORT_SYMBOL_GPL(raid6_xor_syndrome); @@ -94,7 +96,7 @@ EXPORT_SYMBOL_GPL(raid6_xor_syndrome); */ bool raid6_can_xor_syndrome(void) { - return !!raid6_call.xor_syndrome; + return !!static_call_query(raid6_xor_syndrome_impl); } EXPORT_SYMBOL_GPL(raid6_can_xor_syndrome); @@ -193,7 +195,8 @@ static int raid6_choose_gen(void *(*const dptrs)[RAID6_TEST_DISKS], return -EINVAL; } - raid6_call = *best; + static_call_update(raid6_gen_syndrome_impl, best->gen_syndrome); + static_call_update(raid6_xor_syndrome_impl, best->xor_syndrome); pr_info("raid6: using algorithm %s gen() %ld MB/s\n", best->name, @@ -238,7 +241,10 @@ static int __init raid6_select_algo(void) if (!IS_ENABLED(CONFIG_RAID6_PQ_BENCHMARK) || raid6_nr_algos == 1) { pr_info("raid6: skipped pq benchmark and selected %s\n", raid6_algos[0]->name); - raid6_call = *raid6_algos[0]; + static_call_update(raid6_gen_syndrome_impl, + raid6_algos[0]->gen_syndrome); + static_call_update(raid6_xor_syndrome_impl, + raid6_algos[0]->xor_syndrome); return 0; } -- 2.47.3