Patchwork [9/20] powerpc/mm: Call mmu_context_init() from ppc64 (v2)

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Submitter Benjamin Herrenschmidt
Date July 24, 2009, 9:15 a.m.
Message ID <20090724091539.AD25FDDD1B@ozlabs.org>
Download mbox | patch
Permalink /patch/30185/
State Accepted
Commit 6f0ef0f505af1ce6e9756087a9d4cc3778bae8c6
Delegated to: Benjamin Herrenschmidt
Headers show

Comments

Benjamin Herrenschmidt - July 24, 2009, 9:15 a.m.
Our 64-bit hash context handling has no init function, but 64-bit Book3E
will use the common mmu_context_nohash.c code which does, so define an
empty inline mmu_context_init() for 64-bit server and call it from
our 64-bit setup_arch()

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
---

v2. Remove whitespace addition to mmu_context_hash64.c

 arch/powerpc/include/asm/mmu_context.h |    7 ++++++-
 arch/powerpc/kernel/setup_64.c         |    4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

Patch

--- linux-work.orig/arch/powerpc/include/asm/mmu_context.h	2009-07-22 16:25:25.000000000 +1000
+++ linux-work/arch/powerpc/include/asm/mmu_context.h	2009-07-22 16:25:50.000000000 +1000
@@ -14,7 +14,6 @@ 
 /*
  * Most if the context management is out of line
  */
-extern void mmu_context_init(void);
 extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
 extern void destroy_context(struct mm_struct *mm);
 
@@ -23,6 +22,12 @@  extern void switch_stab(struct task_stru
 extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
 extern void set_context(unsigned long id, pgd_t *pgd);
 
+#ifdef CONFIG_PPC_BOOK3S_64
+static inline void mmu_context_init(void) { }
+#else
+extern void mmu_context_init(void);
+#endif
+
 /*
  * switch_mm is the entry point called from the architecture independent
  * code in kernel/sched.c
Index: linux-work/arch/powerpc/kernel/setup_64.c
===================================================================
--- linux-work.orig/arch/powerpc/kernel/setup_64.c	2009-07-22 16:26:23.000000000 +1000
+++ linux-work/arch/powerpc/kernel/setup_64.c	2009-07-22 16:26:31.000000000 +1000
@@ -534,6 +534,10 @@  void __init setup_arch(char **cmdline_p)
 #endif
 
 	paging_init();
+
+	/* Initialize the MMU context management stuff */
+	mmu_context_init();
+
 	ppc64_boot_msg(0x15, "Setup Done");
 }