usb: musb: add tracepoints for register access

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This adds tracepoints to musb register read/write wrappers to get
trace log for register access.

The default tacepoint log prefix here would be musb_readX/writeX(),
which is not much helpful. So this patch let the tracepoints use
__buildin_return_address(0) to print the caller funciton name to
provide more context of the register access.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Bin Liu 2016-06-30 12:12:24 -05:00 • committed by Greg Kroah-Hartman

parent 086b288282

commit c74173fdd4

2 changed files with 103 additions and 3 deletions

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19

drivers/usb/musb/musb_core.c

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87

drivers/usb/musb/musb_trace.h

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