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Commit afef7889 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds
Browse files

initramfs: cleanup populate_rootfs 

The code for kernels that support ramdisks or not is mostly the same.
Unify it by using an IS_ENABLED for the info message, and moving the error
message into a stub for populate_initrd_image.

[cai@lca.pw: fix a compilation error]
  Link: http://lkml.kernel.org/r/20190328014806.36375-1-cai@lca.pw
Link: http://lkml.kernel.org/r/20190213174621.29297-6-hch@lst.de


Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarQian Cai <cai@lca.pw>
Acked-by: default avatarMike 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7c184ecd

init/initramfs.c

+20 −17
Original line number Diff line number Diff line
@@ -595,7 +595,11 @@ static void __init clean_rootfs(void) 
	ksys_close(fd);

	kfree(buf);

}

#endif

#else

static inline void clean_rootfs(void)

{

}

#endif /* CONFIG_BLK_DEV_RAM */



#ifdef CONFIG_BLK_DEV_RAM

static void populate_initrd_image(char *err)
@@ -617,6 +621,11 @@ static void populate_initrd_image(char *err) 
		       written, initrd_end - initrd_start);

	ksys_close(fd);

}

#else

static void populate_initrd_image(char *err)

{

	printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err);

}

#endif /* CONFIG_BLK_DEV_RAM */



static int __init populate_rootfs(void)
@@ -625,28 +634,22 @@ static int __init populate_rootfs(void) 
	char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);

	if (err)

		panic("%s", err); /* Failed to decompress INTERNAL initramfs */

	/* If available load the bootloader supplied initrd */

	if (initrd_start && !IS_ENABLED(CONFIG_INITRAMFS_FORCE)) {

#ifdef CONFIG_BLK_DEV_RAM

		printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n");

		err = unpack_to_rootfs((char *)initrd_start,

			initrd_end - initrd_start);

		if (!err)



	if (!initrd_start || IS_ENABLED(CONFIG_INITRAMFS_FORCE))

		goto done;



	if (IS_ENABLED(CONFIG_BLK_DEV_RAM))

		printk(KERN_INFO "Trying to unpack rootfs image as initramfs...\n");

	else

		printk(KERN_INFO "Unpacking initramfs...\n");



	err = unpack_to_rootfs((char *)initrd_start, initrd_end - initrd_start);

	if (err) {

		clean_rootfs();

		populate_initrd_image(err);

	done:

		/* empty statement */;

#else

		printk(KERN_INFO "Unpacking initramfs...\n");

		err = unpack_to_rootfs((char *)initrd_start,

			initrd_end - initrd_start);

		if (err)

			printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err);

#endif

	}



done:

	/*

	 * If the initrd region is overlapped with crashkernel reserved region,

	 * free only memory that is not part of crashkernel region.