From 46a93917bf776c35dfdfe7601f8972dacd9259ee Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Thu, 26 Feb 2026 22:05:21 +0100 Subject: [PATCH] iommufd: Constify struct dma_buf_attach_ops 'struct dma_buf_attach_ops' is not modified in this driver. Constifying this structure 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: Before: ====== text data bss dec hex filename 81096 13899 192 95187 173d3 drivers/iommu/iommufd/pages.o After: ===== text data bss dec hex filename 81160 13835 192 95187 173d3 drivers/iommu/iommufd/pages.o Link: https://patch.msgid.link/r/67e9126bbffa1d5c05124773a8dd4a3493be77ac.1772139886.git.christophe.jaillet@wanadoo.fr Signed-off-by: Christophe JAILLET Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommufd/pages.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index 9b49f0c5b4599..4691456616ea3 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -1450,7 +1450,7 @@ static void iopt_revoke_notify(struct dma_buf_attachment *attach) pages->dmabuf.phys.len = 0; } -static struct dma_buf_attach_ops iopt_dmabuf_attach_revoke_ops = { +static const struct dma_buf_attach_ops iopt_dmabuf_attach_revoke_ops = { .allow_peer2peer = true, .move_notify = iopt_revoke_notify, }; -- 2.47.3