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parisc: Remove pte_inserted define 

The attached change removes the pte_inserted from pgtable.h.  As a
result, we always flush the TLB entry when the associated page table
entry is changed.

This change doesn't impact performance signifcantly and it may catch
some cases where the TLB needs flushing but wasn't.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2018-10-19 20:33:29 -04:00 committed by Helge Deller
parent fe8376dbbd
commit 5a23237f14
1 changed files with 2 additions and 8 deletions
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6
arch/parisc/include/asm/pgtable.h
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@ -55,10 +55,6 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
*(pteptr) = (pteval); \ *(pteptr) = (pteval); \
} while(0) } while(0)
#define pte_inserted(x) \
((pte_val(x) & (_PAGE_PRESENT|_PAGE_ACCESSED)) \
== (_PAGE_PRESENT|_PAGE_ACCESSED))
#define set_pte_at(mm, addr, ptep, pteval) \ #define set_pte_at(mm, addr, ptep, pteval) \
do { \ do { \
pte_t old_pte; \ pte_t old_pte; \
@ -66,7 +62,6 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
spin_lock_irqsave(&pa_tlb_lock, flags); \ spin_lock_irqsave(&pa_tlb_lock, flags); \
old_pte = *ptep; \ old_pte = *ptep; \
set_pte(ptep, pteval); \ set_pte(ptep, pteval); \
if (pte_inserted(old_pte)) \
purge_tlb_entries(mm, addr); \ purge_tlb_entries(mm, addr); \
spin_unlock_irqrestore(&pa_tlb_lock, flags); \ spin_unlock_irqrestore(&pa_tlb_lock, flags); \
} while (0) } while (0)
@ -493,7 +488,6 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
spin_lock_irqsave(&pa_tlb_lock, flags); spin_lock_irqsave(&pa_tlb_lock, flags);
old_pte = *ptep; old_pte = *ptep;
set_pte(ptep, __pte(0)); set_pte(ptep, __pte(0));
if (pte_inserted(old_pte))
purge_tlb_entries(mm, addr); purge_tlb_entries(mm, addr);
spin_unlock_irqrestore(&pa_tlb_lock, flags); spin_unlock_irqrestore(&pa_tlb_lock, flags);