Commit c367714c authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Benjamin Herrenschmidt
Browse files

powerpc: Update gup_pmd_range to handle transparent hugepages 



Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent db7cb5b9

arch/powerpc/mm/gup.c

+8 −2
Original line number Diff line number Diff line
@@ -66,9 +66,15 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, 
		pmd_t pmd = *pmdp;



		next = pmd_addr_end(addr, end);

		if (pmd_none(pmd))

		/*

		 * If we find a splitting transparent hugepage we

		 * return zero. That will result in taking the slow

		 * path which will call wait_split_huge_page()

		 * if the pmd is still in splitting state

		 */

		if (pmd_none(pmd) || pmd_trans_splitting(pmd))

			return 0;

		if (pmd_huge(pmd)) {

		if (pmd_huge(pmd) || pmd_large(pmd)) {

			if (!gup_hugepte((pte_t *)pmdp, PMD_SIZE, addr, next,

					 write, pages, nr))

				return 0;