linux-kernel - [PATCH] x86: fix placement of FIX_OHCI1394

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Date:	Fri, 26 Feb 2010 09:22:21 +0000
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	<mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc:	<justinmattock@...il.com>, <stable@...nel.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: fix placement of FIX_OHCI1394_BASE

Ever for 32-bit with sufficiently high NR_CPUS, and starting with
commit 789d03f584484af85dbdc64935270c8e45f36ef7 also for 64-bit, the
statically allocated early fixmap page tables were not covering
FIX_OHCI1394_BASE, leading to a boot time crash when
"ohci1394_dma=early" was used. Despite this entry not being a
permanently used one, it needs to be moved into the permanent range
since it has to be close to FIX_DBGP_BASE and FIX_EARLYCON_MEM_BASE.

(A patch version applying to -tip is attached.)

Signed-off-by: Jan Beulich <jbeulich@...ell.com>
Cc: <stable@...nel.org>
Fixes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=14487 
Reported-bisected-and-tested-by: Justin P. Mattock <justinmattock@...il.com>

---
 arch/x86/include/asm/fixmap.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- linux-2.6.33/arch/x86/include/asm/fixmap.h	2009-12-03 04:51:21.000000000 +0100
+++ 2.6.33-ohci1394-fixmap/arch/x86/include/asm/fixmap.h	2010-02-26 00:00:00.000000000 +0100
@@ -82,6 +82,9 @@ enum fixed_addresses {
 #endif
 	FIX_DBGP_BASE,
 	FIX_EARLYCON_MEM_BASE,
+#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
+	FIX_OHCI1394_BASE,
+#endif
 #ifdef CONFIG_X86_LOCAL_APIC
 	FIX_APIC_BASE,	/* local (CPU) APIC) -- required for SMP or not */
 #endif
@@ -126,9 +129,6 @@ enum fixed_addresses {
 	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
 			(__end_of_permanent_fixed_addresses & 255),
 	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
-#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
-	FIX_OHCI1394_BASE,
-#endif
 #ifdef CONFIG_X86_32
 	FIX_WP_TEST,
 #endif

View attachment "linux-tip-ohci1394-fixmap.patch" of type "text/plain" (1426 bytes)