PAGE_OWNER now depends on STACKTRACE_SUPPORT

One of the enhancements I made to the PAGE_OWNER code was to make it use the generic stack trace support. However, there are some architectures that do not support it, like m68k. So, make PAGE_OWNER also depend on having STACKTRACE_SUPPORT.

This isn't ideal since it restricts the number of places PAGE_OWNER runs now, but it at least hits all the major architectures.

tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   83b324c5ff5cca85bbeb2ba913d465f108afe472
commit: 2a561c9d47c295ed91984c2b916a4dd450ee0279 [484/499] debugging-keep-track-of-page-owners-fix
config: make ARCH=m68k allmodconfig

All warnings:

warning: (PAGE_OWNER && STACK_TRACER && BLK_DEV_IO_TRACE && KMEMCHECK) selects STACKTRACE which has unmet direct dependencies (STACKTRACE_SUPPORT)

---

 linux-2.6.git-dave/lib/Kconfig.debug |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN lib/Kconfig.debug~now-depends-on-STACKTRACE_SUPPORT lib/Kconfig.debug
@@ -101,7 +101,7 @@ config UNUSED_SYMBOLS
 
 config PAGE_OWNER
 	bool "Track page owner"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && STACKTRACE_SUPPORT
 	select DEBUG_FS
 	select STACKTRACE
 	help

_

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