From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 17 Jul 2008 15:38:17 +0000 (+0200)
Subject: ftrace: fix lockup with MAXSMP
X-Git-Tag: v2.6.27-rc1~1039^2~2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9fa111372a54f695f65e0de2f2a2108fe6cf3584;p=linux-2.6

ftrace: fix lockup with MAXSMP

MAXSMP brings in lots of use of various bitops in smp_processor_id()
and friends - causing ftrace to lock up during bootup:

  calling  anon_inode_init+0x0/0x130
  initcall anon_inode_init+0x0/0x130 returned 0 after 0 msecs
  calling  acpi_event_init+0x0/0x57
  [ hard hang ]

So exclude the bitops facilities from tracing.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/lib/Makefile b/lib/Makefile
index 2c62a9c06f..d90d31102e 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -15,6 +15,9 @@ CFLAGS_REMOVE_string.o = -pg
 CFLAGS_REMOVE_spinlock_debug.o = -pg
 CFLAGS_REMOVE_list_debug.o = -pg
 CFLAGS_REMOVE_debugobjects.o = -pg
+CFLAGS_REMOVE_find_next_bit.o = -pg
+CFLAGS_REMOVE_cpumask.o = -pg
+CFLAGS_REMOVE_bitmap.o = -pg
 endif
 
 lib-$(CONFIG_MMU) += ioremap.o