From 505f2b970b2269ce4cb669b3ff4f6479d379cec2 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 20 Mar 2009 11:05:04 +0100 Subject: [PATCH] tracing, Text Edit Lock - kprobes architecture independent support, nommu fix Impact: build fix on SH !CONFIG_MMU Stephen Rothwell reported this linux-next build failure on the SH architecture: kernel/built-in.o: In function `disable_all_kprobes': kernel/kprobes.c:1382: undefined reference to `text_mutex' [...] And observed: | Introduced by commit 4460fdad85becd569f11501ad5b91814814335ff ("tracing, | Text Edit Lock - kprobes architecture independent support") from the | tracing tree. text_mutex is defined in mm/memory.c which is only built | if CONFIG_MMU is defined, which is not true for sh allmodconfig. Move this lock to kernel/extable.c (which is already home to various kernel text related routines), which file is always built-in. Reported-by: Stephen Rothwell Cc: Paul Mundt Cc: Mathieu Desnoyers LKML-Reference: <20090320110602.86351a91.sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar --- kernel/extable.c | 14 ++++++++++++-- mm/memory.c | 8 -------- 2 files changed, 12 insertions(+), 10 deletions(-) diff --git a/kernel/extable.c b/kernel/extable.c index 0df6253730be..25d39b0c3a1b 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -15,11 +15,21 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include #include +#include #include -#include -#include + #include +#include + +/* + * mutex protecting text section modification (dynamic code patching). + * some users need to sleep (allocating memory...) while they hold this lock. + * + * NOT exported to modules - patching kernel text is a really delicate matter. + */ +DEFINE_MUTEX(text_mutex); extern struct exception_table_entry __start___ex_table[]; extern struct exception_table_entry __stop___ex_table[]; diff --git a/mm/memory.c b/mm/memory.c index 05fab3bc5b4b..dfc9e4ea4e8b 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -101,14 +101,6 @@ int randomize_va_space __read_mostly = 2; #endif -/* - * mutex protecting text section modification (dynamic code patching). - * some users need to sleep (allocating memory...) while they hold this lock. - * - * NOT exported to modules - patching kernel text is a really delicate matter. - */ -DEFINE_MUTEX(text_mutex); - static int __init disable_randmaps(char *s) { randomize_va_space = 0; -- 2.20.1