From: Steven Rostedt <srostedt@redhat.com>
Date: Mon, 2 May 2011 21:34:47 +0000 (-0400)
Subject: ftrace: Separate hash allocation and assignment
X-Git-Tag: v3.0-rc1~404^2^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33dc9b1267d59cef46ff0bd6bc043190845dc919;p=pandora-kernel.git

ftrace: Separate hash allocation and assignment

When filtering, allocate a hash to insert the function records.
After the filtering is complete, assign it to the ftrace_ops structure.

This allows the ftrace_ops structure to have a much smaller array of
hash buckets instead of wasting a lot of memory.

A read only empty_hash is created to be the minimum size that any ftrace_ops
can point to.

When a new hash is created, it has the following steps:

o Allocate a default hash.
o Walk the function records assigning the filtered records to the hash
o Allocate a new hash with the appropriate size buckets
o Move the entries from the default hash to the new hash.

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