+ m32r-fix-build-failure-due-to-smp-and-mmu.patch added to -mm tree

+ m32r-fix-build-failure-due-to-smp-and-mmu.patch added to -mm tree

[akpm]

The patch titled
     Subject: m32r: fix build failure due to SMP and MMU
has been added to the -mm tree.  Its filename is
     m32r-fix-build-failure-due-to-smp-and-mmu.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/m32r-fix-build-failure-due-to-smp-and-mmu.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/m32r-fix-build-failure-due-to-smp-and-mmu.patch

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------------------------------------------------------
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Subject: m32r: fix build failure due to SMP and MMU

One of the randconfig build failed with the error:

arch/m32r/kernel/smp.c: In function 'smp_flush_tlb_mm':
arch/m32r/kernel/smp.c:283:20: error: subscripted value is neither array nor pointer nor vector
  mmc = &mm->context[cpu_id];
                    ^
arch/m32r/kernel/smp.c: In function 'smp_flush_tlb_page':
arch/m32r/kernel/smp.c:353:20: error: subscripted value is neither array nor pointer nor vector
  mmc = &mm->context[cpu_id];
                    ^
arch/m32r/kernel/smp.c: In function 'smp_invalidate_interrupt':
arch/m32r/kernel/smp.c:479:41: error: subscripted value is neither array nor pointer nor vector
  unsigned long *mmc = &flush_mm->context[cpu_id];

It turned out that CONFIG_SMP was defined but CONFIG_MMU was not defined. 
But arch/m32r/include/asm/mmu.h only defines mm_context_t as an array when
both CONFIG_SMP and CONFIG_MMU are defined.  And arch/m32r/kernel/smp.c is
always using context as an array.  So without MMU SMP can not work.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/m32r/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -puN arch/m32r/Kconfig~m32r-fix-build-failure-due-to-smp-and-mmu arch/m32r/Kconfig
--- a/arch/m32r/Kconfig~m32r-fix-build-failure-due-to-smp-and-mmu
+++ a/arch/m32r/Kconfig
@@ -276,6 +276,7 @@ source "kernel/Kconfig.preempt"
 
 config SMP
 	bool "Symmetric multi-processing support"
+	depends on MMU
 	---help---
 	  This enables support for systems with more than one CPU. If you have
 	  a system with only one CPU, say N. If you have a system with more
_

Patches currently in -mm which might be from sudipm.mukherjee@gmail.com are

proc-fix-missing-reference-of-mm.patch
m32r-fix-build-failure-due-to-smp-and-mmu.patch
m32r-mm-fix-build-warning.patch