TononixOS/ubports_kernel_google_msm
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tracing: have trace_printk process arguments before storing

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trace_printk records its arguments in the internal ring buffer for
them to be processed later. The mapping between the format string
for the particular instance of a trace_printk call and the
arguments is maintained using the instruction pointer internally
in the kernel. However, this makes it harder for an external tool
to process this data, which is necessary when the same data
is logged to the STM and needs to be processed externally.

Change-Id: Ifa2ae5fe1f1fd62c85fac432a581737450781f88
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>
(cherry picked from commit c86e25f0f775d7effaf192ded6fb7a6885694d7b)
This commit is contained in:
Pushkar Joshi
2012-10-31 13:39:26 -07:00
committed by Rohit Vaswani
parent 2d168136d4
commit 715363e77e
1 changed files with 1 additions and 1 deletions
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2
include/linux/kernel.h
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@@ -486,7 +486,7 @@ do { \
__attribute__((section("__trace_printk_fmt"))) = \
__builtin_constant_p(fmt) ? fmt : NULL; \
\
__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \
__trace_printk(_THIS_IP_, trace_printk_fmt, ##args); \
} else \
__trace_printk(_THIS_IP_, fmt, ##args); \
} while (0)