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| author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2019-11-29 14:36:58 +0000 |
|---|---|---|
| committer | Paul Burton <paulburton@kernel.org> | 2019-12-02 10:50:37 -0800 |
| commit | 7d2aa4bb90f5f6f1b8de8848c26042403f2d7bf9 (patch) | |
| tree | 27d4180d0551ee83d6689a95a9f10e789365ac2c /arch/mips/include/asm/vdso | |
| parent | 87f67cc4c7b81273fd1d9f775192eeb3124562f9 (diff) | |
| download | linux-7d2aa4bb90f5f6f1b8de8848c26042403f2d7bf9.tar.bz2 | |
mips: Fix gettimeofday() in the vdso library
The libc provides a discovery mechanism for vDSO library and its
symbols. When a symbol is not exposed by the vDSOs the libc falls back
on the system calls.
With the introduction of the unified vDSO library on mips this behavior
is not honored anymore by the kernel in the case of gettimeofday().
The issue has been noticed and reported due to a dhclient failure on the
CI20 board:
root@letux:~# dhclient
../../../../lib/isc/unix/time.c:200: Operation not permitted
root@letux:~#
Restore the original behavior fixing gettimeofday() in the vDSO library.
Reported-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com> # CI20 with JZ4780
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: mips-creator-ci20-dev@googlegroups.com
Cc: letux-kernel@openphoenux.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/include/asm/vdso')
| -rw-r--r-- | arch/mips/include/asm/vdso/gettimeofday.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index b08825531e9f..0ae9b4cbc153 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -26,8 +26,6 @@ #define __VDSO_USE_SYSCALL ULLONG_MAX -#ifdef CONFIG_MIPS_CLOCK_VSYSCALL - static __always_inline long gettimeofday_fallback( struct __kernel_old_timeval *_tv, struct timezone *_tz) @@ -48,17 +46,6 @@ static __always_inline long gettimeofday_fallback( return error ? -ret : ret; } -#else - -static __always_inline long gettimeofday_fallback( - struct __kernel_old_timeval *_tv, - struct timezone *_tz) -{ - return -1; -} - -#endif - static __always_inline long clock_gettime_fallback( clockid_t _clkid, struct __kernel_timespec *_ts) |