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SubjectRe: [PATCH] mm: D-cache aliasing issue in cow_user_page
In light of James Bottomsley's commit[1] declaring that kmap() and
friends now have to take care of coherency issues, is the patch "mm:
D-cache aliasing issue in cow_user_page"[2] correct, or could it
potentially cause a slowdown by calling flush_dcache_page() a second
time (i.e. once in an architecture-specific kmap() implementation, and
once in cow_user_page())?


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