[PATCH] powerpc/mm/radix: Drop unneeded NULL check

[Aneesh Kumar K.V]

From: Michael Ellerman <m...@ellerman.id.au>

We call these functions with non-NULL mm or vma. Hence we can skip the NULL
check in these functions. We also remove now unused function
__local_flush_hugetlb_page().

Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/hugetlb.h |  6 ------
 arch/powerpc/mm/tlb-radix.c        | 18 ++++++++----------
 2 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/arch/powerpc/include/asm/hugetlb.h 
b/arch/powerpc/include/asm/hugetlb.h
index b8a0fb442c64..795d825c2edd 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -40,12 +40,6 @@ static inline void flush_hugetlb_page(struct vm_area_struct 
*vma,
                return radix__flush_hugetlb_page(vma, vmaddr);
 }
 
-static inline void __local_flush_hugetlb_page(struct vm_area_struct *vma,
-                                             unsigned long vmaddr)
-{
-       if (radix_enabled())
-               return radix__local_flush_hugetlb_page(vma, vmaddr);
-}
 #else
 
 static inline pte_t *hugepd_page(hugepd_t hpd)
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 191cc5abc940..98fdf2243d35 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -164,7 +164,7 @@ void radix__local_flush_tlb_page_psize(struct mm_struct 
*mm, unsigned long vmadd
        unsigned long ap = mmu_get_ap(psize);
 
        preempt_disable();
-       pid = mm ? mm->context.id : 0;
+       pid = mm->context.id;
        if (pid != MMU_NO_CONTEXT)
                _tlbiel_va(vmaddr, pid, ap, RIC_FLUSH_TLB);
        preempt_enable();
@@ -175,10 +175,9 @@ void radix__local_flush_tlb_page(struct vm_area_struct 
*vma, unsigned long vmadd
 #ifdef CONFIG_HUGETLB_PAGE
        /* need the return fix for nohash.c */
        if (vma && is_vm_hugetlb_page(vma))
-               return __local_flush_hugetlb_page(vma, vmaddr);
+               return radix__local_flush_hugetlb_page(vma, vmaddr);
 #endif
-       radix__local_flush_tlb_page_psize(vma ? vma->vm_mm : NULL, vmaddr,
-                                         mmu_virtual_psize);
+       radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, 
mmu_virtual_psize);
 }
 EXPORT_SYMBOL(radix__local_flush_tlb_page);
 
@@ -232,7 +231,7 @@ void radix__flush_tlb_page_psize(struct mm_struct *mm, 
unsigned long vmaddr,
        unsigned long ap = mmu_get_ap(psize);
 
        preempt_disable();
-       pid = mm ? mm->context.id : 0;
+       pid = mm->context.id;
        if (unlikely(pid == MMU_NO_CONTEXT))
                goto bail;
        if (!mm_is_thread_local(mm))
@@ -247,10 +246,9 @@ void radix__flush_tlb_page(struct vm_area_struct *vma, 
unsigned long vmaddr)
 {
 #ifdef CONFIG_HUGETLB_PAGE
        if (vma && is_vm_hugetlb_page(vma))
-               return flush_hugetlb_page(vma, vmaddr);
+               return radix__flush_hugetlb_page(vma, vmaddr);
 #endif
-       radix__flush_tlb_page_psize(vma ? vma->vm_mm : NULL, vmaddr,
-                                   mmu_virtual_psize);
+       radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, mmu_virtual_psize);
 }
 EXPORT_SYMBOL(radix__flush_tlb_page);
 
@@ -330,7 +328,7 @@ void radix__flush_tlb_range_psize(struct mm_struct *mm, 
unsigned long start,
 
 
        preempt_disable();
-       pid = mm ? mm->context.id : 0;
+       pid = mm->context.id;
        if (unlikely(pid == MMU_NO_CONTEXT))
                goto err_out;
 
@@ -361,7 +359,7 @@ void radix__flush_tlb_collapsed_pmd(struct mm_struct *mm, 
unsigned long addr)
        unsigned long pid, end;
 
 
-       pid = mm ? mm->context.id : 0;
+       pid = mm->context.id;
        if (unlikely(pid == MMU_NO_CONTEXT))
                goto no_context;
 
-- 
2.13.6