sparc64: delete old wrap code

The old method that is using xcall and softint to get new context id is
deleted, as it is replaced by a method of using per_cpu_secondary_mm
without xcall to perform the context wrap.

Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Steven Sistare <steven.sistare@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 1 insertions, 45 deletions

diff --git a/arch/sparc/include/asm/mmu_context_64.h b/arch/sparc/include/asm/mmu_context_64.h
index edb45247bfa9..2cddcda4f85f 100644
--- a/arch/sparc/include/asm/mmu_context_64.h
+++ b/arch/sparc/include/asm/mmu_context_64.h
@@ -21,12 +21,6 @@ extern unsigned long mmu_context_bmap[];
 
 DECLARE_PER_CPU(struct mm_struct *, per_cpu_secondary_mm);
 void get_new_mmu_context(struct mm_struct *mm);
-#ifdef CONFIG_SMP
-void smp_new_mmu_context_version(void);
-#else
-#define smp_new_mmu_context_version() do { } while (0)
-#endif
-
 int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
 void destroy_context(struct mm_struct *mm);
 
diff --git a/arch/sparc/include/asm/pil.h b/arch/sparc/include/asm/pil.h
index 266937030546..522b43db2ed3 100644
--- a/arch/sparc/include/asm/pil.h
+++ b/arch/sparc/include/asm/pil.h
@@ -20,7 +20,6 @@
 #define PIL_SMP_CALL_FUNC       1
 #define PIL_SMP_RECEIVE_SIGNAL  2
 #define PIL_SMP_CAPTURE         3
-#define PIL_SMP_CTX_NEW_VERSION 4
 #define PIL_DEVICE_IRQ          5
 #define PIL_SMP_CALL_FUNC_SNGL  6
 #define PIL_DEFERRED_PCR_WORK   7
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index c9804551262c..6ae1e77be0bf 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -37,7 +37,6 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr
 /* smp_64.c */
 void __irq_entry smp_call_function_client(int irq, struct pt_regs *regs);
 void __irq_entry smp_call_function_single_client(int irq, struct pt_regs *regs);
-void __irq_entry smp_new_mmu_context_version_client(int irq, struct pt_regs *regs);
 void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs);
 void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs);
 
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index b3bc0ac757cc..fdf31040a7dc 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -964,37 +964,6 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
         preempt_enable();
 }
 
-void __irq_entry smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
-{
-        struct mm_struct *mm;
-        unsigned long flags;
-
-        clear_softint(1 << irq);
-
-        /* See if we need to allocate a new TLB context because
-         * the version of the one we are using is now out of date.
-         */
-        mm = current->active_mm;
-        if (unlikely(!mm || (mm == &init_mm)))
-                return;
-
-        spin_lock_irqsave(&mm->context.lock, flags);
-
-        if (unlikely(!CTX_VALID(mm->context)))
-                get_new_mmu_context(mm);
-
-        spin_unlock_irqrestore(&mm->context.lock, flags);
-
-        load_secondary_context(mm);
-        __flush_tlb_mm(CTX_HWBITS(mm->context),
-                       SECONDARY_CONTEXT);
-}
-
-void smp_new_mmu_context_version(void)
-{
-        smp_cross_call(&xcall_new_mmu_context_version, 0, 0, 0);
-}
-
 #ifdef CONFIG_KGDB
 void kgdb_roundup_cpus(unsigned long flags)
 {
diff --git a/arch/sparc/kernel/ttable_64.S b/arch/sparc/kernel/ttable_64.S
index 7bd8f6556352..efe93ab4a9c0 100644
--- a/arch/sparc/kernel/ttable_64.S
+++ b/arch/sparc/kernel/ttable_64.S
@@ -50,7 +50,7 @@ tl0_resv03e:	BTRAP(0x3e) BTRAP(0x3f) BTRAP(0x40)
 tl0_irq1:       TRAP_IRQ(smp_call_function_client, 1)
 tl0_irq2:       TRAP_IRQ(smp_receive_signal_client, 2)
 tl0_irq3:       TRAP_IRQ(smp_penguin_jailcell, 3)
-tl0_irq4:       TRAP_IRQ(smp_new_mmu_context_version_client, 4)
+tl0_irq4:       BTRAP(0x44)
 #else
 tl0_irq1:       BTRAP(0x41)
 tl0_irq2:       BTRAP(0x42)
diff --git a/arch/sparc/mm/ultra.S b/arch/sparc/mm/ultra.S
index 5d2fd6cd3189..fcf4d27a38fb 100644
--- a/arch/sparc/mm/ultra.S
+++ b/arch/sparc/mm/ultra.S
@@ -971,11 +971,6 @@ xcall_capture:
         wr              %g0, (1 << PIL_SMP_CAPTURE), %set_softint
         retry
 
-        .globl          xcall_new_mmu_context_version
-xcall_new_mmu_context_version:
-        wr              %g0, (1 << PIL_SMP_CTX_NEW_VERSION), %set_softint
-        retry
-
 #ifdef CONFIG_KGDB
         .globl          xcall_kgdb_capture
 xcall_kgdb_capture: