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Tue, 27 Oct 2026 22:50:56 -0700 (PDT) Received: from [127.0.0.1] ([85.204.204.133]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e3ecd354asm25432978f8f.43.2026.10.27.22.50.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Oct 2026 22:50:56 -0700 (PDT) From: Ana Bobillo To: Tom Rini Cc: u-boot@lists.u-boot-project.org, Simon Glass , Marek Vasut , Bin Meng , Neil Armstrong , Heinrich Schuchardt , Ilias Apalodimas , Alexey Charkov , Javier Martinez Canillas , =?UTF-8?Q?Marek_Beh=C3=BAn?= , Qu Wenruo , Matthias Brugger , Peter Robinson , Peng Fan , Jaehoon Chung Subject: [PATCH v2 01/12] treewide: Use is_power_of_2() from linux/log2.h Date: Wed, 28 Oct 2026 05:50:55 +0000 Message-ID: <5a883249-dcd6-4cc0-a1e5-868e2384bf8e@gmail.com> In-Reply-To: <01ba3f81-06b7-428b-9224-bd887c35e1c3@gmail.com> References: <01ba3f81-06b7-428b-9224-bd887c35e1c3@gmail.com> X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: From: Ana Bobillo The btrfs code and the bcm2835_sdhost driver each define their own is_power_of_2(), which clashes with the one in linux/log2.h once a header they include brings that in, as include/blk.h does after the next patch. Drop both and use the common one. The btrfs copy is the same as the common one. The bcm2835_sdhost copy takes a u64 and also takes 0 as a power of two; its only caller checks the block size of a data transfer, which the MMC core never sets to 0, and the Linux driver it comes from makes the same check with the common is_power_of_2(). Signed-off-by: Ana Bobillo --- Changes in v2: - New patch, so that blk.h can use is_power_of_2() from linux/log2.h drivers/mmc/bcm2835_sdhost.c | 6 +----- fs/btrfs/compat.h | 6 +----- 2 files changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/mmc/bcm2835_sdhost.c b/drivers/mmc/bcm2835_sdhost.c index 720127468d3..eee7e2d43a2 100644 --- a/drivers/mmc/bcm2835_sdhost.c +++ b/drivers/mmc/bcm2835_sdhost.c @@ -42,6 +42,7 @@ #include #include #include +#include #include #include #include @@ -660,11 +661,6 @@ static void bcm2835_set_clock(struct bcm2835_host *host, unsigned int clock) writel(host->mmc->clock / 2, host->ioaddr + SDTOUT); } -static inline int is_power_of_2(u64 x) -{ - return !(x & (x - 1)); -} - static int bcm2835_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data) { diff --git a/fs/btrfs/compat.h b/fs/btrfs/compat.h index 4596b9d1dd3..ffeba740eff 100644 --- a/fs/btrfs/compat.h +++ b/fs/btrfs/compat.h @@ -4,6 +4,7 @@ #define __BTRFS_COMPAT_H__ #include +#include #include #include @@ -74,9 +75,4 @@ static inline void uuid_unparse(const u8 *uuid, char *out) return uuid_bin_to_str((unsigned char *)uuid, out, 0); } -static inline int is_power_of_2(unsigned long n) -{ - return (n != 0 && ((n & (n - 1)) == 0)); -} - #endif