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authorDavid Howells <dhowells@redhat.com>2022-10-27 18:19:44 +0300
committerSteve French <stfrench@microsoft.com>2023-02-21 02:25:43 +0300
commit0185846975339a5c348373aa450a977f5242366b (patch)
tree1999ae8a5becdd01523a96e641dea1f12e6b3f82 /mm
parent85dd2c8ff368b1446be9febde84afe1d7aec4261 (diff)
downloadlinux-0185846975339a5c348373aa450a977f5242366b.tar.xz
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')
-rw-r--r--mm/vmalloc.c1
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