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    Subject[PATCH] powerpc: Mark the variable earlycon_acpi_spcr_enable maybe_unused
    Date
    Re-use the object-like macro EARLYCON_USED_OR_UNUSED to mark
    `earlycon_acpi_spcr_enable` as maybe_unused.

    Fix the following warning (treated as error in W=1)

    CC arch/powerpc/kernel/setup-common.o
    In file included from ./include/linux/serial_8250.h:14:0,
    from arch/powerpc/kernel/setup-common.c:33:
    ./include/linux/serial_core.h:382:19: error: ‘earlycon_acpi_spcr_enable’ defined but not used [-Werror=unused-const-variable=]
    static const bool earlycon_acpi_spcr_enable;
    ^~~~~~~~~~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors

    Signed-off-by: Mathieu Malaterre <malat@debian.org>
    ---
    include/linux/serial_core.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
    index b32df49a3bd5..1d356105f25a 100644
    --- a/include/linux/serial_core.h
    +++ b/include/linux/serial_core.h
    @@ -379,7 +379,7 @@ extern int of_setup_earlycon(const struct earlycon_id *match,
    extern bool earlycon_acpi_spcr_enable __initdata;
    int setup_earlycon(char *buf);
    #else
    -static const bool earlycon_acpi_spcr_enable;
    +static const bool earlycon_acpi_spcr_enable EARLYCON_USED_OR_UNUSED;
    static inline int setup_earlycon(char *buf) { return 0; }
    #endif

    --
    2.11.0
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