The patch titled
Subject: mm/hmm: struct hmm is only use by HMM mirror functionality v2
has been added to the -mm tree. Its filename is
mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Jérôme Glisse <jglisse@xxxxxxxxxx>
Subject: mm/hmm: struct hmm is only use by HMM mirror functionality v2
The struct hmm is only used if the HMM mirror functionality is enabled
move associated code behind CONFIG_HMM_MIRROR to avoid build error if one
enable some of the HMM memory configuration without the mirror feature.
Link: http://lkml.kernel.org/r/20170825213133.27286-1-jglisse@xxxxxxxxxx
Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx>
Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Subhash Gutti <sgutti@xxxxxxxxxx>
Cc: Evgeny Baskakov <ebaskakov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/hmm.h | 8 ++++----
mm/hmm.c | 7 +++----
2 files changed, 7 insertions(+), 8 deletions(-)
diff -puN include/linux/hmm.h~mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2 include/linux/hmm.h
--- a/include/linux/hmm.h~mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2
+++ a/include/linux/hmm.h
@@ -501,18 +501,18 @@ void hmm_device_put(struct hmm_device *h
/* Below are for HMM internal use only! Not to be used by device driver! */
+#if IS_ENABLED(CONFIG_HMM_MIRROR)
void hmm_mm_destroy(struct mm_struct *mm);
static inline void hmm_mm_init(struct mm_struct *mm)
{
mm->hmm = NULL;
}
-
-#else /* IS_ENABLED(CONFIG_HMM) */
-
-/* Below are for HMM internal use only! Not to be used by device driver! */
+#else /* IS_ENABLED(CONFIG_HMM_MIRROR) */
static inline void hmm_mm_destroy(struct mm_struct *mm) {}
static inline void hmm_mm_init(struct mm_struct *mm) {}
+#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */
+
#endif /* IS_ENABLED(CONFIG_HMM) */
#endif /* LINUX_HMM_H */
diff -puN mm/hmm.c~mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2 mm/hmm.c
--- a/mm/hmm.c~mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2
+++ a/mm/hmm.c
@@ -41,11 +41,12 @@
*/
DEFINE_STATIC_KEY_FALSE(device_private_key);
EXPORT_SYMBOL(device_private_key);
-static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
#endif /* CONFIG_DEVICE_PRIVATE || CONFIG_DEVICE_PUBLIC */
-#ifdef CONFIG_HMM
+#if IS_ENABLED(CONFIG_HMM_MIRROR)
+static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
+
/*
* struct hmm - HMM per mm struct
*
@@ -128,9 +129,7 @@ void hmm_mm_destroy(struct mm_struct *mm
{
kfree(mm->hmm);
}
-#endif /* CONFIG_HMM */
-#if IS_ENABLED(CONFIG_HMM_MIRROR)
static void hmm_invalidate_range(struct hmm *hmm,
enum hmm_update_type action,
unsigned long start,
_
Patches currently in -mm which might be from jglisse@xxxxxxxxxx are
hmm-heterogeneous-memory-management-documentation-v3.patch
mm-hmm-heterogeneous-memory-management-hmm-for-short-v5.patch
mm-hmm-mirror-mirror-process-address-space-on-device-with-hmm-helpers-v3.patch
mm-hmm-mirror-helper-to-snapshot-cpu-page-table-v4.patch
mm-hmm-mirror-device-page-fault-handler.patch
mm-zone_device-new-type-of-zone_device-for-unaddressable-memory-v5.patch
mm-zone_device-special-case-put_page-for-device-private-pages-v4.patch
mm-memcontrol-allow-to-uncharge-page-without-using-page-lru-field.patch
mm-memcontrol-support-memory_device_private-v4.patch
mm-hmm-devmem-device-memory-hotplug-using-zone_device-v7.patch
mm-hmm-devmem-dummy-hmm-device-for-zone_device-memory-v3.patch
mm-migrate-new-migrate-mode-migrate_sync_no_copy.patch
mm-migrate-new-memory-migration-helper-for-use-with-device-memory-v5.patch
mm-migrate-migrate_vma-unmap-page-from-vma-while-collecting-pages.patch
mm-migrate-support-un-addressable-zone_device-page-in-migration-v3.patch
mm-migrate-allow-migrate_vma-to-alloc-new-page-on-empty-entry-v4.patch
mm-device-public-memory-device-memory-cache-coherent-with-cpu-v5.patch
mm-hmm-add-new-helper-to-hotplug-cdm-memory-region-v3.patch
mm-hmm-avoid-bloating-arch-that-do-not-make-use-of-hmm.patch
mm-hmm-struct-hmm-is-only-use-by-hmm-mirror-functionality-v2.patch
lib-interval_tree-fast-overlap-detection-fix.patch
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