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.deSigned-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NQian Cai <cai@lca.pw> Acked-by: NMike 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: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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