]> git.karo-electronics.de Git - karo-tx-linux.git/commit
coresight: tmc: allocating memory when needed
authorMathieu Poirier <mathieu.poirier@linaro.org>
Tue, 3 May 2016 17:33:52 +0000 (11:33 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 3 May 2016 21:59:30 +0000 (14:59 -0700)
commitde5461970b3e9e19470b821f5feaa3235ceb35f5
tree903b380554676dd128decdf1456cf40aeb4a3a82
parent4525412a5046692abb7a0588589d8ed2c20585e0
coresight: tmc: allocating memory when needed

In it's current form the TMC probe() function allocates
trace buffer memory at boot time, event if coresight isn't
used.  This is highly inefficient since trace buffers can
occupy a lot of memory that could be used otherwised.

This patch allocates trace buffers on the fly, when the
coresight subsystem is solicited.  Allocated buffers are
released when traces are read using the device descriptors
under /dev.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing/coresight/coresight-tmc-etf.c
drivers/hwtracing/coresight/coresight-tmc-etr.c
drivers/hwtracing/coresight/coresight-tmc.c