Messages in this thread | | | Date | Tue, 20 Aug 2019 19:16:50 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH 1/3] csky: Fixup arch_get_unmapped_area() implementation |
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> +/* > + * We need to ensure that shared mappings are correctly aligned to > + * avoid aliasing issues with VIPT caches. We need to ensure that > + * a specific page of an object is always mapped at a multiple of > + * SHMLBA bytes. > + * > + * We unconditionally provide this function for all cases. > + */
On something unrelated: If csky has virtually indexed caches you also need to implement the flush_kernel_vmap_range and invalidate_kernel_vmap_range functions to avoid data corruption when doing I/O on vmalloc/vmap ranges.
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