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| author |   Vincenzo Frascino <vincenzo.frascino@arm.com> | 2019-10-16 14:40:24 +0100 |
|---|---|---|
| committer |   Paul Burton <paulburton@kernel.org> | 2019-10-18 14:29:16 -0700 |
| commit | 8a1bef4193e81c8afae4d2f107f1c09c8ce89470 (patch) | |
| tree | 1d26ba9a9e6eb48bc256f270f6c0c011d695ba63 /arch/mips/bcm63xx/prom.c | |
| parent | MAINTAINERS: Use @kernel.org address for Paul Burton (diff) | |
| download | linux-dev-8a1bef4193e81c8afae4d2f107f1c09c8ce89470.tar.xz linux-dev-8a1bef4193e81c8afae4d2f107f1c09c8ce89470.zip | |
mips: vdso: Fix __arch_get_hw_counter()
On some MIPS variants (e.g. MIPS r1), vDSO clock_mode is set to
VDSO_CLOCK_NONE.
When VDSO_CLOCK_NONE is set the expected kernel behavior is to fallback
on syscalls. To do that the generic vDSO library expects UULONG_MAX as
return value of __arch_get_hw_counter().
Fix __arch_get_hw_counter() on MIPS defining a __VDSO_USE_SYSCALL case
that addressed the described scenario.
Reported-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Tested-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Diffstat (limited to 'arch/mips/bcm63xx/prom.c')
0 files changed, 0 insertions, 0 deletions