powerpc, ftrace: use unsigned int for instruction manipulation

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The original port of ftrace to PowerPC kept a lot of the code used
by x86. Some of this code was to handle x86's 5 byte instruction.
This was handled by using character arrays to manipulate the
code.

PowerPC has a consistent 4 byte instruction. Using unsigned ints
makes the code more efficient as well as more readable.
By converting to use unsigned ints to represent instructions,
I was able to remove the side effects that were needed for
manipulating character strings.

  i.e. memcpy and memcmp

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Steven Rostedt 2009-02-13 06:31:39 -08:00 • committed by Benjamin Herrenschmidt

parent 60ce8f7260

commit b54dcfe108

1 changed files with 18 additions and 27 deletions

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arch/powerpc/kernel/ftrace.c

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