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| author | Goran Ferenc <goran.ferenc@imgtec.com> | 2017-06-28 18:55:30 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-06-29 03:42:30 +0300 |
| commit | 0b523a85e134d41f57ddd8c5193bd9f0a5e20b0d (patch) | |
| tree | 53df5cfb90329d12fd3fe83641a261dbaaf07d9f /arch/mips/sgi-ip32/ip32-memory.c | |
| parent | 180902e08f051f72c89ffa366f4e4f7a8e9c753e (diff) | |
| download | linux-0b523a85e134d41f57ddd8c5193bd9f0a5e20b0d.tar.xz | |
MIPS: VDSO: Add implementation of gettimeofday() fallback
This patch adds gettimeofday_fallback() function that wraps assembly
invocation of gettimeofday() syscall using __NR_gettimeofday.
This function is used if pure VDSO implementation gettimeofday()
does not succeed for any reason. Its imeplementation is enclosed in
"#ifdef CONFIG_MIPS_CLOCK_VSYSCALL" to be in sync with the similar
arrangement for __vdso_gettimeofday().
If syscall invocation via __NR_gettimeofday fails, register a3 will
be set. So, after the syscall, register a3 is tested and the return
valuem is negated if it's set.
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Cc: Douglas Leung <douglas.leung@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Petar Jovanovic <petar.jovanovic@imgtec.com>
Cc: Raghu Gandham <raghu.gandham@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16640/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/sgi-ip32/ip32-memory.c')
0 files changed, 0 insertions, 0 deletions