Patch "powerpc/mm: Fix build break when CMA=n && SPAPR_TCE_IOMMU=y" has been added to the 4.10-stable tree

This is a note to let you know that I've just added the patch titled

    powerpc/mm: Fix build break when CMA=n && SPAPR_TCE_IOMMU=y

to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
powerpc-mm-fix-build-break-when-cma-n-spapr_tce_iommu-y.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Michael Ellerman <[email protected]>
Date: Tue, 14 Feb 2017 13:44:05 +1100
Subject: powerpc/mm: Fix build break when CMA=n && SPAPR_TCE_IOMMU=y
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From: Michael Ellerman <[email protected]>

commit a05ef161cdd22faccffe06f21fc8f1e249565385 upstream.

Currently the build breaks if CMA=n and SPAPR_TCE_IOMMU=y:

arch/powerpc/mm/mmu_context_iommu.c: In function ‘mm_iommu_get’:
arch/powerpc/mm/mmu_context_iommu.c:193:42: error: ‘MIGRATE_CMA’ undeclared (first use in this function) if (get_pageblock_migratetype(page) == MIGRATE_CMA) {
^~~~~~~~~~~

Fix it by using the existing is_migrate_cma_page(), which evaulates to false when CMA=n.

---
 arch/powerpc/mm/mmu_context_iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -184,7 +184,7 @@ long mm_iommu_get(struct mm_struct *mm,
 		 * of the CMA zone if possible. NOTE: faulting in + migration
 		 * can be expensive. Batching can be considered later
 		 */
-		if (get_pageblock_migratetype(page) == MIGRATE_CMA) {
+		if (is_migrate_cma_page(page)) {
 			if (mm_iommu_move_page_from_cma(page))
 				goto populate;
 			if (1 != get_user_pages_fast(ua + (i << PAGE_SHIFT),

Patches currently in stable-queue which might be from [email protected] are

queue-4.10/powerpc-mm-fix-build-break-when-cma-n-spapr_tce_iommu-y.patch queue-4.10/powerpc-perf-handle-sdar_mode-for-marked-event-in-power9.patch queue-4.10/powerpc-perf-avoid-fab_-_match-checks-for-power9.patch queue-4.10/powerpc-mm-fixup-wrong-lpcr_vrmasd-value.patch queue-4.10/powerpc-correctly-disable-latent-entropy-gcc-plugin-on-prom_init.o.patch queue-4.10/powerpc-ftrace-fix-confusing-help-text-for-disable_mprofile_kernel.patch queue-4.10/powerpc-powernv-fix-opal_exit-tracepoint-opcode.patch queue-4.10/powerpc-perf-fix-perf_get_data_addr-for-power9-dd1.patch