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Fri, 12 Sep 2025 17:55:18 -0700 (PDT) From: Askar Safin To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Linus Torvalds , Greg Kroah-Hartman , Christian Brauner , Al Viro , Jan Kara , Christoph Hellwig , Jens Axboe , Andy Shevchenko , Aleksa Sarai , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Julian Stecklina , Gao Xiang , Art Nikpal , Andrew Morton , Eric Curtin , Alexander Graf , Rob Landley , Lennart Poettering , linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, x86@kernel.org, Ingo Molnar , linux-block@vger.kernel.org, initramfs@vger.kernel.org, linux-api@vger.kernel.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-ext4@vger.kernel.org, "Theodore Y . Ts'o" , linux-acpi@vger.kernel.org, Michal Simek , devicetree@vger.kernel.org, Luis Chamberlain , Kees Cook , Thorsten Blum , Heiko Carstens , patches@lists.linux.dev Subject: [PATCH RESEND 14/62] init: m68k, mips, powerpc, s390, sh: remove Root_RAM0 Date: Sat, 13 Sep 2025 00:37:53 +0000 Message-ID: <20250913003842.41944-15-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250913003842.41944-1-safinaskar@gmail.com> References: <20250913003842.41944-1-safinaskar@gmail.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 Root_RAM0 used to specify ramdisk as root device. It means nothing now, so let's remove it Signed-off-by: Askar Safin --- arch/m68k/kernel/uboot.c | 1 - arch/mips/kernel/setup.c | 1 - arch/powerpc/kernel/setup-common.c | 11 ++++------- arch/powerpc/platforms/powermac/setup.c | 4 +--- arch/s390/kernel/setup.c | 2 -- arch/sh/kernel/setup.c | 4 +--- include/linux/root_dev.h | 1 - init/do_mounts.c | 2 -- 8 files changed, 6 insertions(+), 20 deletions(-) diff --git a/arch/m68k/kernel/uboot.c b/arch/m68k/kernel/uboot.c index fa7c279ead5d..d278060a250c 100644 --- a/arch/m68k/kernel/uboot.c +++ b/arch/m68k/kernel/uboot.c @@ -83,7 +83,6 @@ static void __init parse_uboot_commandline(char *commandp, int size) (uboot_initrd_end > uboot_initrd_start)) { initrd_start = uboot_initrd_start; initrd_end = uboot_initrd_end; - ROOT_DEV = Root_RAM0; pr_info("initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); } #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 11b9b6b63e19..a78e24873231 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -173,7 +173,6 @@ static unsigned long __init init_initrd(void) goto disable; } - ROOT_DEV = Root_RAM0; return PFN_UP(end); disable: initrd_start = 0; diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 68d47c53876c..97d330f3b8f1 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -363,17 +363,14 @@ void __init check_for_initrd(void) DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end); - /* If we were passed an initrd, set the ROOT_DEV properly if the values - * look sensible. If not, clear initrd reference. + /* If we were not passed an sensible initramfs, clear initramfs reference. */ - if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && - initrd_end > initrd_start) - ROOT_DEV = Root_RAM0; - else + if (!(is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && + initrd_end > initrd_start)) initrd_start = initrd_end = 0; if (initrd_start) - pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); + pr_info("Found initramfs at 0x%lx:0x%lx\n", initrd_start, initrd_end); DBG(" <- check_for_initrd()\n"); #endif /* CONFIG_BLK_DEV_INITRD */ diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index eb092f293113..237d8386a3f4 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -296,9 +296,7 @@ static void __init pmac_setup_arch(void) #endif #ifdef CONFIG_PPC32 #ifdef CONFIG_BLK_DEV_INITRD - if (initrd_start) - ROOT_DEV = Root_RAM0; - else + if (!initrd_start) #endif ROOT_DEV = DEFAULT_ROOT_DEVICE; #endif diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 7b529868789f..a4ce721b7fe8 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -923,8 +923,6 @@ void __init setup_arch(char **cmdline_p) /* boot_command_line has been already set up in early.c */ *cmdline_p = boot_command_line; - ROOT_DEV = Root_RAM0; - setup_initial_init_mm(_text, _etext, _edata, _end); if (IS_ENABLED(CONFIG_EXPOLINE_AUTO)) diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 50f1d39fe34f..c4312ee13db9 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -147,10 +147,8 @@ void __init check_for_initrd(void) /* * If we got this far in spite of the boot loader's best efforts - * to the contrary, assume we actually have a valid initrd and - * fix up the root dev. + * to the contrary, assume we actually have a valid initramfs. */ - ROOT_DEV = Root_RAM0; /* * Address sanitization diff --git a/include/linux/root_dev.h b/include/linux/root_dev.h index 847c9a06101b..e411533b90b7 100644 --- a/include/linux/root_dev.h +++ b/include/linux/root_dev.h @@ -10,7 +10,6 @@ enum { Root_NFS = MKDEV(UNNAMED_MAJOR, 255), Root_CIFS = MKDEV(UNNAMED_MAJOR, 254), Root_Generic = MKDEV(UNNAMED_MAJOR, 253), - Root_RAM0 = MKDEV(RAMDISK_MAJOR, 0), }; extern dev_t ROOT_DEV; diff --git a/init/do_mounts.c b/init/do_mounts.c index f0b1a83dbda4..5c407ca54063 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -437,8 +437,6 @@ static dev_t __init parse_root_device(char *root_device_name) return Root_NFS; if (strcmp(root_device_name, "/dev/cifs") == 0) return Root_CIFS; - if (strcmp(root_device_name, "/dev/ram") == 0) - return Root_RAM0; error = early_lookup_bdev(root_device_name, &dev); if (error) { -- 2.47.2