Searched hist:"17 cc1dd4" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/drivers/tty/hvc/ |
| H A D | hvc_opal.c | 17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
| /openbmc/linux/arch/powerpc/include/asm/ |
| H A D | opal.h | 17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
|
| /openbmc/linux/arch/powerpc/platforms/powernv/ |
| H A D | opal.c | 17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
17cc1dd4 Mon Apr 30 09:55:51 CDT 2018 Nicholas Piggin <npiggin@gmail.com> powerpc/powernv: implement opal_put_chars_atomic
The RAW console does not need writes to be atomic, so relax
opal_put_chars to be able to do partial writes, and implement an
_atomic variant which does not take a spinlock. This API is used
in xmon, so the less locking that is used, the better chance there
is that a crash can be debugged.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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