diff options
| author |   David Howells <dhowells@redhat.com> | 2022-10-27 16:19:44 +0100 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2023-02-20 17:25:43 -0600 |
| commit | 0185846975339a5c348373aa450a977f5242366b (patch) | |
| tree | 1999ae8a5becdd01523a96e641dea1f12e6b3f82 /mm/vmalloc.c | |
| parent | netfs: Add a function to extract a UBUF or IOVEC into a BVEC iterator (diff) | |
| download | wireguard-linux-0185846975339a5c348373aa450a977f5242366b.tar.xz wireguard-linux-0185846975339a5c348373aa450a977f5242366b.zip | |
netfs: Add a function to extract an iterator into a scatterlist
Provide a function for filling in a scatterlist from the list of pages
contained in an iterator.
If the iterator is UBUF- or IOBUF-type, the pages have a pin taken on them
(as FOLL_PIN).
If the iterator is BVEC-, KVEC- or XARRAY-type, no pin is taken on the
pages and it is left to the caller to manage their lifetime. It cannot be
assumed that a ref can be validly taken, particularly in the case of a KVEC
iterator.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: linux-cachefs@redhat.com
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index ca71de7c9d77..61f5bec0f2b6 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -656,6 +656,7 @@ int is_vmalloc_or_module_addr(const void *x) #endif return is_vmalloc_addr(x); } +EXPORT_SYMBOL_GPL(is_vmalloc_or_module_addr); /* * Walk a vmap address to the struct page it maps. Huge vmap mappings will |