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    Subject[patch 22/26] Add __discard section to x86
    Add a __discard sectionto the linker script. Code produced in this section will
    not be put in the vmlinux file. This is useful when we have to calculate the
    size of an instruction before actually declaring it (for alignment purposes for
    instance). This is used by the immediate values.

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
    Acked-by: H. Peter Anvin <hpa@zytor.com>
    CC: Andi Kleen <ak@muc.de>
    CC: Chuck Ebbert <cebbert@redhat.com>
    CC: Christoph Hellwig <hch@infradead.org>
    CC: Jeremy Fitzhardinge <jeremy@goop.org>
    CC: Thomas Gleixner <tglx@linutronix.de>
    CC: Ingo Molnar <mingo@redhat.com>
    ---
    arch/x86/kernel/vmlinux_32.lds.S | 1 +
    arch/x86/kernel/vmlinux_64.lds.S | 1 +
    2 files changed, 2 insertions(+)

    Index: linux-2.6-lttng.mm/arch/x86/kernel/vmlinux_32.lds.S
    ===================================================================
    --- linux-2.6-lttng.mm.orig/arch/x86/kernel/vmlinux_32.lds.S 2008-01-24 14:40:42.000000000 -0500
    +++ linux-2.6-lttng.mm/arch/x86/kernel/vmlinux_32.lds.S 2008-01-24 14:41:23.000000000 -0500
    @@ -201,6 +201,7 @@ SECTIONS
    /* Sections to be discarded */
    /DISCARD/ : {
    *(.exitcall.exit)
    + *(__discard)
    }

    STABS_DEBUG
    Index: linux-2.6-lttng.mm/arch/x86/kernel/vmlinux_64.lds.S
    ===================================================================
    --- linux-2.6-lttng.mm.orig/arch/x86/kernel/vmlinux_64.lds.S 2008-01-24 14:40:42.000000000 -0500
    +++ linux-2.6-lttng.mm/arch/x86/kernel/vmlinux_64.lds.S 2008-01-24 14:41:23.000000000 -0500
    @@ -226,6 +226,7 @@ SECTIONS
    /DISCARD/ : {
    *(.exitcall.exit)
    *(.eh_frame)
    + *(__discard)
    }

    STABS_DEBUG
    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68


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