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RDMA/umem: Constify struct dma_buf_attach_ops

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'struct dma_buf_attach_ops' are not modified in this driver.

Constifying these structures moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  10300	   1216	      0	  11516	   2cfc	drivers/infiniband/core/umem_dmabuf.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  10428	   1088	      0	  11516	   2cfc	drivers/infiniband/core/umem_dmabuf.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patch.msgid.link/3ca4ace543a02ccfdcce1ba568895c994aad7abb.1784018825.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Christophe JAILLET 2026-07-14 10:47:32 +02:00 committed by Leon Romanovsky
parent 1069f1c821
commit 6af255a94f
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/core/umem_dmabuf.c
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@ -181,7 +181,7 @@ struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
}
EXPORT_SYMBOL(ib_umem_dmabuf_get);
static struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_ops = {
static const struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_ops = {
.allow_peer2peer = true,
};
@ -205,7 +205,7 @@ static void ib_umem_dmabuf_revoke_locked(struct dma_buf_attachment *attach)
umem_dmabuf->revoked = 1;
}
static struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_revocable_ops = {
static const struct dma_buf_attach_ops ib_umem_dmabuf_attach_pinned_revocable_ops = {
.allow_peer2peer = true,
.invalidate_mappings = ib_umem_dmabuf_revoke_locked,
};