From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.126.com (m16.mail.126.com [220.197.31.9]) (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 C646223507C; Fri, 24 Jul 2026 02:18:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784859488; cv=none; b=pFe1CWVBOoYGm8QzqiT/qbc7FSouQ+G6USKovKHUnzZUEly8Dvnfbb0mrBaJ7/9Bb0/NA3cUVigReni5XUajd/dIj6uu7YjXJ56jgoCGXI6ASdC67rITJpi20OUI6r/hPxlQFPQbqiZryvaIsRCD1QMwPPBNkvHk/ESPH0DtCME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784859488; c=relaxed/simple; bh=rwRg529y05peA/WWTMCXEBfX3q0s9gAsSrO8arvTDhM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Udv56V9xCfVJxhYRYDg+oD+o8A8OYh9Q+MRX1L6OQV4XPJiKY0WlhSa1tEkaeyJwsovsRQdzUUkw7psDmYIz3pDG1Q5aGJOUQX9hoR9pOBPE59WWeHK9k4fhu75WLIh0eaBRxddYgJdPZ2RsbZvzUVlan9OK951snMtGjcO1eq4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com; spf=pass smtp.mailfrom=126.com; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b=ipar9103; arc=none smtp.client-ip=220.197.31.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=126.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b="ipar9103" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=L/ SZp0vPqZ6bgIHdMlwc9563CUsJkyQzIo7rI6wG1fs=; b=ipar9103VugBwa7uzk RoqjOghrHfRoqDl2bzaHe0YPIkBrqYCLgiYNa1/ES/GRQ8WHq2GbajVuBN2uMDbr +3gkFYU0bsk813V33HstJUih1FcKIA7lBelM4qVniwAowoHQCdo0vuE4VHpsY6gY n6ZDAiMe/dnXvn4gK6jlV0i+Y= Received: from song-MS-7D48.. (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> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:PSkvCgDnr+wRymJqH7z4DA--.34972S3 X-Coremail-Antispam: 1Uf129KBjvJXoWrtr4DJw4kKF1xCrWkZFW8JFb_yoW8JF1DpF 1q9r9rury8K348Cry8AFZ2yr1F9rsrGrZxKasxWws7Zw17tF4kt39FgrWUXrykGrW8uayj va9rWFZ0yr45AFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRwvttUUUUU= 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