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xtensa: optimize local_flush_tlb_kernel_range

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Don't flush whole TLB if only a small kernel range is requested.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov
2014-02-14 14:08:48 +04:00
parent 8585b316bb
commit 04c6b3e2b5
3 changed files with 34 additions and 7 deletions
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11
arch/xtensa/include/asm/tlbflush.h
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@@ -36,6 +36,7 @@ void local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long page);
void local_flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
#ifdef CONFIG_SMP
@@ -44,12 +45,7 @@ void flush_tlb_mm(struct mm_struct *);
void flush_tlb_page(struct vm_area_struct *, unsigned long);
void flush_tlb_range(struct vm_area_struct *, unsigned long,
unsigned long);
static inline void flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
flush_tlb_all();
}
void flush_tlb_kernel_range(unsigned long start, unsigned long end);
#else /* !CONFIG_SMP */
@@ -58,7 +54,8 @@ static inline void flush_tlb_kernel_range(unsigned long start,
#define flush_tlb_page(vma, page) local_flush_tlb_page(vma, page)
#define flush_tlb_range(vma, vmaddr, end) local_flush_tlb_range(vma, vmaddr, \
end)
#define flush_tlb_kernel_range(start, end) local_flush_tlb_all()
#define flush_tlb_kernel_range(start, end) local_flush_tlb_kernel_range(start, \
end)
#endif /* CONFIG_SMP */