ftrace: Add modify_ftrace_direct()

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Add a new function modify_ftrace_direct() that will allow a user to update
an existing direct caller to a new trampoline, without missing hits due to
unregistering one and then adding another.

Link: https://lore.kernel.org/r/20191109022907.6zzo6orhxpt5n2sv@ast-mbp.dhcp.thefacebook.com

Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Steven Rostedt (VMware) 2019-11-14 14:39:35 -05:00

parent 36b3615dc3

commit 0567d68091

2 changed files with 84 additions and 0 deletions

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6

include/linux/ftrace.h

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78

kernel/trace/ftrace.c

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