powerpc: add context.vdso_base for 32-bit too

This adds a vdso_base element to the mm_context_t for 32-bit compiles
(both for ARCH=powerpc and ARCH=ppc).  This fixes the compile errors
that have been reported in arch/powerpc/kernel/signal_32.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 16 insertions, 11 deletions

diff --git a/include/asm-ppc/mmu_context.h b/include/asm-ppc/mmu_context.h
index 4f152cca13c1..4454ecf1aed5 100644
--- a/include/asm-ppc/mmu_context.h
+++ b/include/asm-ppc/mmu_context.h
@@ -71,7 +71,7 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 #else
 
 /* PPC 6xx, 7xx CPUs */
-#define NO_CONTEXT      	((mm_context_t) -1)
+#define NO_CONTEXT      	((unsigned long) -1)
 #define LAST_CONTEXT    	32767
 #define FIRST_CONTEXT    	1
 #endif
@@ -86,7 +86,7 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
  * can be used for debugging on all processors (if you happen to have
  * an Abatron).
  */
-extern void set_context(mm_context_t context, pgd_t *pgd);
+extern void set_context(unsigned long contextid, pgd_t *pgd);
 
 /*
  * Bitmap of contexts in use.
@@ -99,7 +99,7 @@ extern unsigned long context_map[];
  * Its use is an optimization only, we can't rely on this context
  * number to be free, but it usually will be.
  */
-extern mm_context_t next_mmu_context;
+extern unsigned long next_mmu_context;
 
 /*
  * If we don't have sufficient contexts to give one to every task
@@ -118,9 +118,9 @@ extern void steal_context(void);
  */
 static inline void get_mmu_context(struct mm_struct *mm)
 {
-	mm_context_t ctx;
+	unsigned long ctx;
 
-	if (mm->context != NO_CONTEXT)
+	if (mm->context.id != NO_CONTEXT)
 		return;
 #ifdef FEW_CONTEXTS
 	while (atomic_dec_if_positive(&nr_free_contexts) < 0)
@@ -133,7 +133,7 @@ static inline void get_mmu_context(struct mm_struct *mm)
 			ctx = 0;
 	}
 	next_mmu_context = (ctx + 1) & LAST_CONTEXT;
-	mm->context = ctx;
+	mm->context.id = ctx;
 #ifdef FEW_CONTEXTS
 	context_mm[ctx] = mm;
 #endif
@@ -142,7 +142,12 @@ static inline void get_mmu_context(struct mm_struct *mm)
 /*
  * Set up the context for a new address space.
  */
-#define init_new_context(tsk,mm)	(((mm)->context = NO_CONTEXT), 0)
+static inline int init_new_context(struct task_struct *t, struct mm_struct *mm)
+{
+	mm->context.id = NO_CONTEXT;
+	mm->context.vdso_base = 0;
+	return 0;
+}
 
 /*
  * We're finished using the context for an address space.
@@ -150,9 +155,9 @@ static inline void get_mmu_context(struct mm_struct *mm)
 static inline void destroy_context(struct mm_struct *mm)
 {
 	preempt_disable();
-	if (mm->context != NO_CONTEXT) {
-		clear_bit(mm->context, context_map);
-		mm->context = NO_CONTEXT;
+	if (mm->context.id != NO_CONTEXT) {
+		clear_bit(mm->context.id, context_map);
+		mm->context.id = NO_CONTEXT;
 #ifdef FEW_CONTEXTS
 		atomic_inc(&nr_free_contexts);
 #endif
@@ -180,7 +185,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 
 	/* Setup new userspace context */
 	get_mmu_context(next);
-	set_context(next->context, next->pgd);
+	set_context(next->context.id, next->pgd);
 }
 
 #define deactivate_mm(tsk,mm)	do { } while (0)