From: Robert Richter <robert.richter@amd.com>
Date: Thu, 25 Dec 2008 16:26:07 +0000 (+0100)
Subject: oprofile: add op_cpu_buffer_write_reserve()
X-Git-Tag: v2.6.29-rc1~32^2~1^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2cc28b9f261dd28d69767a34682ce55a27d928ed;p=pandora-kernel.git

oprofile: add op_cpu_buffer_write_reserve()

This function prepares the cpu buffer to write a sample.

Struct op_entry is used during operations on the ring buffer while
struct op_sample contains the data that is stored in the ring
buffer. Struct entry can be uninitialized. The function reserves a
data array that is specified by size. Use op_cpu_buffer_write_commit()
after preparing the sample. In case of errors a null pointer is
returned, otherwise the pointer to the sample.

Signed-off-by: Robert Richter <robert.richter@amd.com>
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