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(unknown []) by gzsmtp2 (Coremail) with SMTP id PSkvCgDnr+wRymJqH7z4DA--.34972S3; Fri, 24 Jul 2026 10:12:39 +0800 (CST) From: Song Chen To: arnd@arndb.de, kees@kernel.org, clm@fb.com, dsterba@suse.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, kernel@xen0n.name, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, gor@linux.ibm.com, borntraeger@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, jpoimboe@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Song Chen Subject: [RFC PATCH v2 1/3] error-injection: Introduce EI_ETYPE_FALSE for fail_function Date: Fri, 24 Jul 2026 10:12:27 +0800 Message-ID: <20260724021229.47302-2-chensong_2000@126.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260724021229.47302-1-chensong_2000@126.com> References: <20260724021229.47302-1-chensong_2000@126.com> 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-CM-TRANSID:PSkvCgDnr+wRymJqH7z4DA--.34972S3 X-Coremail-Antispam: 1Uf129KBjvJXoWrtr4DJw4kKF1xCrWkZFW8JFb_yoW8JF1DpF 1q9r9rury8K348Cry8AFZ2yr1F9rsrGrZxKasxWws7Zw17tF4kt39FgrWUXrykGrW8uayj va9rWFZ0yr45AFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRwvttUUUUU= X-Originating-IP: [221.238.56.48] X-CM-SenderInfo: xfkh02prqjsjqqqqqiyswou0bp/xtbBsxfqampiyhdNyQAA31 Introduce EI_ETYPE_FALSE for functions which need false as return value in their error-injections, like btrfs_data_csum_ok. EI_ETYPE_NULL can return 0 too but its readability is not good enough. Signed-off-by: Song Chen --- include/asm-generic/error-injection.h | 1 + kernel/fail_function.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/asm-generic/error-injection.h b/include/asm-generic/error-injection.h index b05253f68eaa..6c399121ab7a 100644 --- a/include/asm-generic/error-injection.h +++ b/include/asm-generic/error-injection.h @@ -8,6 +8,7 @@ enum { EI_ETYPE_ERRNO, /* Return -ERRNO if failure */ EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */ EI_ETYPE_TRUE, /* Return true if failure */ + EI_ETYPE_FALSE, /* Return false if failure */ }; struct error_injection_entry { diff --git a/kernel/fail_function.c b/kernel/fail_function.c index 2eaf55005f49..90cdad0412cd 100644 --- a/kernel/fail_function.c +++ b/kernel/fail_function.c @@ -48,6 +48,8 @@ static unsigned long adjust_error_retval(unsigned long addr, unsigned long retv) break; case EI_ETYPE_TRUE: return 1; + case EI_ETYPE_FALSE: + return 0; } return retv; -- 2.43.0