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    Subject[PATCH V3 07/49] x86/entry: Introduce __entry_text for entry code written in C
    Date
    From: Lai Jiangshan <laijs@linux.alibaba.com>

    Some entry code will be implemented in C files. __entry_text is needed
    to set them in .entry.text section. __entry_text disables instrumentation
    like noinstr, but it doesn't disable stack protector since not all
    compiler supported by kernel supporting function level granular
    attribute to disable stack protector. It will be disabled by C file
    level.

    Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
    ---
    arch/x86/include/asm/idtentry.h | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
    index 1345088e9902..6779def97591 100644
    --- a/arch/x86/include/asm/idtentry.h
    +++ b/arch/x86/include/asm/idtentry.h
    @@ -11,6 +11,9 @@

    #include <asm/irq_stack.h>

    +/* Entry code written in C. */
    +#define __entry_text __noinstr_section(".entry.text")
    +
    /**
    * DECLARE_IDTENTRY - Declare functions for simple IDT entry points
    * No error code pushed by hardware
    --
    2.19.1.6.gb485710b
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