x86_64, ftrace: Make ftrace use kernel identity mapping to modify code

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On x86_64, kernel text mappings are mapped read-only with
CONFIG_DEBUG_RODATA. So use the kernel identity mapping instead
of the kernel text mapping to modify the kernel text.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20091029024821.080941108@sbs-t61.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Suresh Siddha 2009-10-28 18:46:57 -08:00 • committed by Ingo Molnar

parent 502f660466

commit 55ca3cc174

2 changed files with 18 additions and 2 deletions

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17

arch/x86/kernel/ftrace.c

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3

arch/x86/mm/pageattr.c

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