vmlinux.lds.h: lower init ramfs alignment to 4
Mike Frysinger [Tue, 26 Oct 2010 21:22:30 +0000 (14:22 -0700)]
The new init ramfs format (cpio based) requires an alignment of 4 (per the
documentation and per the source files themselves).  As for compressed
sources, the decompressors can all deal with unaligned buffers.

The cpio source is also found in the __init sections of the kernel, so
once they are read and expanded into a tmpfs, the source is freed.  That
means there is no need to force page alignment here either.

This has been used on Blackfin systems for many releases without issue.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-generic/vmlinux.lds.h

index aaf1105..2c0fc10 100644 (file)
 
 #ifdef CONFIG_BLK_DEV_INITRD
 #define INIT_RAM_FS                                                    \
-       . = ALIGN(PAGE_SIZE);                                           \
+       . = ALIGN(4);                                                   \
        VMLINUX_SYMBOL(__initramfs_start) = .;                          \
        *(.init.ramfs)                                                  \
        VMLINUX_SYMBOL(__initramfs_end) = .;