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| author | Christoph Hellwig <hch@lst.de> | 2019-05-13 17:18:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 09:47:47 -0700 |
| commit | 7c184ecd262fe64fe8cf4e099e0f7cefe88d88b2 (patch) | |
| tree | ca950aa20bf44390628608298e6b0a964536f43e /init | |
| parent | 23091e287355440fb680868c23bcada594d3f399 (diff) | |
| download | lwn-7c184ecd262fe64fe8cf4e099e0f7cefe88d88b2.tar.gz lwn-7c184ecd262fe64fe8cf4e099e0f7cefe88d88b2.zip | |
initramfs: factor out a helper to populate the initrd image
This will allow for cleaner code sharing in the caller.
Link: http://lkml.kernel.org/r/20190213174621.29297-5-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com> [arm64]
Cc: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Cc: Steven Price <steven.price@arm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/initramfs.c | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/init/initramfs.c b/init/initramfs.c index 5fda9557a134..e3de626dbd98 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -597,6 +597,28 @@ static void __init clean_rootfs(void) } #endif +#ifdef CONFIG_BLK_DEV_RAM +static void populate_initrd_image(char *err) +{ + ssize_t written; + int fd; + + unpack_to_rootfs(__initramfs_start, __initramfs_size); + + printk(KERN_INFO "rootfs image is not initramfs (%s); looks like an initrd\n", + err); + fd = ksys_open("/initrd.image", O_WRONLY | O_CREAT, 0700); + if (fd < 0) + return; + + written = xwrite(fd, (char *)initrd_start, initrd_end - initrd_start); + if (written != initrd_end - initrd_start) + pr_err("/initrd.image: incomplete write (%zd != %ld)\n", + written, initrd_end - initrd_start); + ksys_close(fd); +} +#endif /* CONFIG_BLK_DEV_RAM */ + static int __init populate_rootfs(void) { /* Load the built in initramfs */ @@ -606,7 +628,6 @@ static int __init populate_rootfs(void) /* If available load the bootloader supplied initrd */ if (initrd_start && !IS_ENABLED(CONFIG_INITRAMFS_FORCE)) { #ifdef CONFIG_BLK_DEV_RAM - int fd; printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n"); err = unpack_to_rootfs((char *)initrd_start, initrd_end - initrd_start); @@ -614,22 +635,7 @@ static int __init populate_rootfs(void) goto done; clean_rootfs(); - unpack_to_rootfs(__initramfs_start, __initramfs_size); - - printk(KERN_INFO "rootfs image is not initramfs (%s)" - "; looks like an initrd\n", err); - fd = ksys_open("/initrd.image", - O_WRONLY|O_CREAT, 0700); - if (fd >= 0) { - ssize_t written = xwrite(fd, (char *)initrd_start, - initrd_end - initrd_start); - - if (written != initrd_end - initrd_start) - pr_err("/initrd.image: incomplete write (%zd != %ld)\n", - written, initrd_end - initrd_start); - - ksys_close(fd); - } + populate_initrd_image(err); done: /* empty statement */; #else |