Andy Lutomirski
88a7c26af8
perf: Move task_pt_regs sampling into arch code
...
On x86_64, at least, task_pt_regs may be only partially initialized
in many contexts, so x86_64 should not use it without extra care
from interrupt context, let alone NMI context.
This will allow x86_64 to override the logic and will supply some
scratch space to use to make a cleaner copy of user regs.
Tested-by: Jiri Olsa <jolsa@kernel.org >
Signed-off-by: Andy Lutomirski <luto@amacapital.net >
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org >
Cc: Stephane Eranian <eranian@google.com >
Cc: chenggang.qcg@taobao.com
Cc: Wu Fengguang <fengguang.wu@intel.com >
Cc: Namhyung Kim <namhyung@gmail.com >
Cc: Mike Galbraith <efault@gmx.de >
Cc: Arjan van de Ven <arjan@linux.intel.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Arnaldo Carvalho de Melo <acme@kernel.org >
Cc: Catalin Marinas <catalin.marinas@arm.com >
Cc: Jean Pihet <jean.pihet@linaro.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Mark Salter <msalter@redhat.com >
Cc: Russell King <linux@arm.linux.org.uk >
Cc: Will Deacon <will.deacon@arm.com >
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/e431cd4c18c2e1c44c774f10758527fb2d1025c4.1420396372.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-01-09 11:12:28 +01:00
