Merge branch 'rdma_mmap' into rdma.git for-next

Jason Gunthorpe says:

====================
Upon review it turns out there are some long standing problems in BAR
mapping area:
 * BAR pages intended for read-only can be switched to writable via mprotect.
 * Missing use of rdma_user_mmap_io for the mlx5 clock BAR page.
 * Disassociate causes SIGBUS when touching the pages.
 * CPU pages are being mapped through to the process via remap_pfn_range
   instead of the more appropriate vm_insert_page, causing weird behaviors
   during disassociation.

This series adds the missing VM_* flag manipulation, adds faulting a zero
page for disassociation and revises the CPU page mappings to use
vm_insert_page.
====================

For dependencies this branch is based on for-rc from
git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git

* branch 'rdma_mmap':
  RDMA: Remove rdma_user_mmap_page
  RDMA/mlx5: Use get_zeroed_page() for clock_info
  RDMA/ucontext: Fix regression with disassociate
  RDMA/mlx5: Use rdma_user_map_io for mapping BAR pages
  RDMA/mlx5: Do not allow the user to write to the clock page

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 43a75ab8ea8a..737ef5ed3930 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2724,9 +2724,6 @@ void ib_set_device_ops(struct ib_device *device,
 #if IS_ENABLED(CONFIG_INFINIBAND_USER_ACCESS)
 int rdma_user_mmap_io(struct ib_ucontext *ucontext, struct vm_area_struct *vma,
 		      unsigned long pfn, unsigned long size, pgprot_t prot);
-int rdma_user_mmap_page(struct ib_ucontext *ucontext,
-			struct vm_area_struct *vma, struct page *page,
-			unsigned long size);
 #else
 static inline int rdma_user_mmap_io(struct ib_ucontext *ucontext,
 				    struct vm_area_struct *vma,
@@ -2735,12 +2732,6 @@ static inline int rdma_user_mmap_io(struct ib_ucontext *ucontext,
 {
 	return -EINVAL;
 }
-static inline int rdma_user_mmap_page(struct ib_ucontext *ucontext,
-				struct vm_area_struct *vma, struct page *page,
-				unsigned long size)
-{
-	return -EINVAL;
-}
 #endif
 
 static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)