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[PATCH] oprofile: fix ia64 callgraph bug with old gcc
- From: Greg Banks <gnb@xxxxxxxxxxxxxxxxx>
- Date: Wed, 05 Jan 2005 20:57:40 +1100
- Organization: Silicon Graphics Inc, Australian Software Group.
G'day,
This patch from Keith Owens fixes a bug in the ia64 port
of oprofile when built without the kdb patch and with a
pre-3.4 gcc.
Greg.
--
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.
If you build a standard kernel with gcc < 3.4 then
ia64_spinlock_contention_pre3_4 is defined. But a standard kernel
does not have ia64_spinlock_contention_pre3_4_end, that label is
only added by the kdb patch. To get the backtrace profiling with
gcc < 3.4, the _end label needs to be added as part of the kernprof
patch, then I will remove it from kdb. Send this to akpm.
From: Keith Owens <kaos@xxxxxxx>
Signed-off-by: Keith Owens <kaos@xxxxxxx>
Signed-off-by: Greg Banks <gnb@xxxxxxxxxxxxxxxxx>
Index: linux/arch/ia64/kernel/head.S
===================================================================
--- linux.orig/arch/ia64/kernel/head.S 2004-10-19 07:54:38.000000000 +1000
+++ linux/arch/ia64/kernel/head.S 2005-01-05 20:37:23.000000000 +1100
@@ -949,6 +949,8 @@ GLOBAL_ENTRY(ia64_spinlock_contention_pr
(p14) br.cond.sptk.few .wait
(p15) rsm psr.i // disable interrupts if we reenabled them
br.cond.sptk.few b6 // lock is now free, try to acquire
+ .global ia64_spinlock_contention_pre3_4_end // for kernprof
+ia64_spinlock_contention_pre3_4_end:
END(ia64_spinlock_contention_pre3_4)
#else