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    Subject[PATCH 3.18 041/124] powerpc/boot: Fix zImage TOC alignment
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Michael Ellerman <mpe@ellerman.id.au>

    commit 97ee351b50a49717543533cfb85b4bf9d88c9680 upstream.

    Recent toolchains force the TOC to be 256 byte aligned. We need to
    enforce this alignment in the zImage linker script, otherwise pointers
    to our TOC variables (__toc_start) could be incorrect. If the actual
    start of the TOC and __toc_start don't have the same value we crash
    early in the zImage wrapper.

    Suggested-by: Alan Modra <amodra@gmail.com>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/powerpc/boot/zImage.lds.S | 1 +
    1 file changed, 1 insertion(+)

    --- a/arch/powerpc/boot/zImage.lds.S
    +++ b/arch/powerpc/boot/zImage.lds.S
    @@ -68,6 +68,7 @@ SECTIONS
    }

    #ifdef CONFIG_PPC64_BOOT_WRAPPER
    + . = ALIGN(256);
    .got :
    {
    __toc_start = .;

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