commit ead514d5fb30a0889d51c0f0e35c3e346165a955
author Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Wed Apr 19 18:22:26 2017 +0530
committer Michael Ellerman <mpe@ellerman.id.au> Mon Apr 24 19:07:58 2017 +1000
tree a6fb97f2cfce93e5c8ff10351cd3f4763ae1fc4e
parent 2f59be5b970b503ca8db1cb723b155e455ebac8e

powerpc/kprobes: Add support for KPROBES_ON_FTRACE

Allow kprobes to be placed on ftrace _mcount() call sites. This optimization
avoids the use of a trap, by riding on ftrace infrastructure.

This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on MPROFILE_KERNEL,
which is only currently enabled on powerpc64le with newer toolchains.

Based on the x86 code by Masami.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>