From: Steven Rostedt <srostedt@redhat.com>
Date: Sat, 17 Dec 2011 00:27:42 +0000 (-0500)
Subject: ftrace: Use bsearch to find record ip
X-Git-Tag: v3.3-rc1~51^2~11^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5855fead9cc358adebd6bdeec202d040c623ae38;p=pandora-kernel.git

ftrace: Use bsearch to find record ip

Now that each set of pages in the function list are sorted by
ip, we can use bsearch to find a record within each set of pages.
This speeds up the ftrace_location() function by magnitudes.

For archs (like x86) that need to add a breakpoint at every function
that will be converted from a nop to a callback and vice versa,
the breakpoint callback needs to know if the breakpoint was for
ftrace or not. It requires finding the breakpoint ip within the
records. Doing a linear search is extremely inefficient. It is
a must to be able to do a fast binary search to find these locations.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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