linux-kernel - [tip:timers/vdso] lib/vdso: Add compat support

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Date:   Sun, 23 Jun 2019 16:45:57 -0700
From:   tip-bot for Vincenzo Frascino <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux@...musvillemoes.dk, 0x7f454c46@...il.com,
        paul.burton@...s.com, vincenzo.frascino@....com,
        tglx@...utronix.de, huw@...eweavers.com, daniel.lezcano@...aro.org,
        will.deacon@....com, arnd@...db.de, shuah@...nel.org,
        salyzyn@...roid.com, linux@...linux.org.uk, sthotton@...vell.com,
        hpa@...or.com, andre.przywara@....com, catalin.marinas@....com,
        pcc@...gle.com, mingo@...nel.org, linux-kernel@...r.kernel.org,
        ralf@...ux-mips.org
Subject: [tip:timers/vdso] lib/vdso: Add compat support

Commit-ID:  629fdf77ac4584b73bf3a7a07f5fc5ab0d27afdc
Gitweb:     https://git.kernel.org/tip/629fdf77ac4584b73bf3a7a07f5fc5ab0d27afdc
Author:     Vincenzo Frascino <vincenzo.frascino@....com>
AuthorDate: Fri, 21 Jun 2019 10:52:36 +0100
Committer:  Thomas Gleixner <tglx@...utronix.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@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Shijith Thotton <sthotton@...vell.com>
Tested-by: Andre Przywara <andre.przywara@....com>
Cc: linux-arch@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-mips@...r.kernel.org
Cc: linux-kselftest@...r.kernel.org
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Russell King <linux@...linux.org.uk>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Paul Burton <paul.burton@...s.com>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Mark Salyzyn <salyzyn@...roid.com>
Cc: Peter Collingbourne <pcc@...gle.com>
Cc: Shuah Khan <shuah@...nel.org>
Cc: Dmitry Safonov <0x7f454c46@...il.com>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Huw Davies <huw@...eweavers.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)