AcoSail/kernel_optimize_test
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[PATCH] uml: avoid already done dirtying

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The PTE returned from handle_mm_fault is already marked as dirty and accessed
if needed.

Also, since this is not set with set_pte() (which sets NEWPAGE and NEWPROT as
needed), this wouldn't work anyway.

This version has been updated and fixed, thanks to some feedback from Jeff Dike.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2005-09-10 19:44:58 +02:00 committed by Linus Torvalds
parent d129f31236
commit 16b036786a
1 changed files with 1 additions and 2 deletions
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3
arch/um/kernel/trap_kern.c
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@ -85,8 +85,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
pte = pte_offset_kernel(pmd, address);
} while(!pte_present(*pte));
err = 0;
*pte = pte_mkyoung(*pte);
if(pte_write(*pte)) *pte = pte_mkdirty(*pte);
WARN_ON(!pte_young(*pte) || (is_write && !pte_dirty(*pte)));
flush_tlb_page(vma, address);
out:
up_read(&mm->mmap_sem);