ANDROID: block: export tracepoints
This patch will export some tracepoints so that vendor modules can use them.
Export these tracepoint functions to track IO data flow for performance tuning.
Bug: 205648026
Bug: 283892333
Change-Id: Ia37b8f99b2d940cecce46c8bc24f724c14450517
Signed-off-by:
Yang Yang <yang.yang@vivo.com>
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