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ARC: thp: unbork !CONFIG_TRANSPARENT_HUGEPAGE build 

linux-next for 4.6-rc1 timeline reported ARC build failures !THP

| arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default]
| arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default]
| arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default]

Turns out that commit ("mm/thp/migration: switch from flush_tlb_range
to flush_pmd_tlb_range") triggered the issue while the problem was in
ARC code where THP specific helpers were not guarded with #ifdef.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2016-03-17 15:00:59 +05:30
parent df420fd688
commit c511eaaa78
1 changed files with 6 additions and 1 deletions
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7
arch/arc/include/asm/tlbflush.h
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@ -17,8 +17,10 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
void local_flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void local_flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
#endif
#ifndef CONFIG_SMP
#define flush_tlb_range(vma, s, e) local_flush_tlb_range(vma, s, e)
@ -26,7 +28,9 @@ void local_flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
#define flush_tlb_kernel_range(s, e) local_flush_tlb_kernel_range(s, e)
#define flush_tlb_all() local_flush_tlb_all()
#define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define flush_pmd_tlb_range(vma, s, e) local_flush_pmd_tlb_range(vma, s, e)
#endif
#else
extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end);
@ -34,7 +38,8 @@ extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
extern void flush_tlb_all(void);
extern void flush_tlb_mm(struct mm_struct *mm);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
#endif
#endif /* CONFIG_SMP */
#endif