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    Subject[tip:timers/vdso] lib/vdso: Add compat support
    Commit-ID:  629fdf77ac4584b73bf3a7a07f5fc5ab0d27afdc
    Gitweb: https://git.kernel.org/tip/629fdf77ac4584b73bf3a7a07f5fc5ab0d27afdc
    Author: Vincenzo Frascino <vincenzo.frascino@arm.com>
    AuthorDate: Fri, 21 Jun 2019 10:52:36 +0100
    Committer: Thomas Gleixner <tglx@linutronix.de>
    CommitDate: Sat, 22 Jun 2019 21:21:05 +0200

    lib/vdso: Add compat support

    Some 64 bit architectures have support for 32 bit applications that
    require a separate version of the vDSOs.

    Add support to the generic code for compat fallback functions.

    Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Tested-by: Shijith Thotton <sthotton@marvell.com>
    Tested-by: Andre Przywara <andre.przywara@arm.com>
    Cc: linux-arch@vger.kernel.org
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-mips@vger.kernel.org
    Cc: linux-kselftest@vger.kernel.org
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Paul Burton <paul.burton@mips.com>
    Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
    Cc: Mark Salyzyn <salyzyn@android.com>
    Cc: Peter Collingbourne <pcc@google.com>
    Cc: Shuah Khan <shuah@kernel.org>
    Cc: Dmitry Safonov <0x7f454c46@gmail.com>
    Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
    Cc: Huw Davies <huw@codeweavers.com>
    Link: https://lkml.kernel.org/r/20190621095252.32307-10-vincenzo.frascino@arm.com

    ---
    lib/vdso/gettimeofday.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
    index 767d3a0bcb06..ef28cc5d7bff 100644
    --- a/lib/vdso/gettimeofday.c
    +++ b/lib/vdso/gettimeofday.c
    @@ -20,7 +20,11 @@
    * - clock_gettime_fallback(): fallback for clock_gettime.
    * - clock_getres_fallback(): fallback for clock_getres.
    */
    +#ifdef ENABLE_COMPAT_VDSO
    +#include <asm/vdso/compat_gettimeofday.h>
    +#else
    #include <asm/vdso/gettimeofday.h>
    +#endif /* ENABLE_COMPAT_VDSO */

    static int do_hres(const struct vdso_data *vd, clockid_t clk,
    struct __kernel_timespec *ts)
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