FAILED: patch "[PATCH] drm/amdgpu/dma_buf: fix page_link check" failed to apply to 5.10-stable tree

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x c0dd8a9253fadfb8e5357217d085f1989da4ef0a
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025042254-rumor-scared-5f6e@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From c0dd8a9253fadfb8e5357217d085f1989da4ef0a Mon Sep 17 00:00:00 2001
From: Matthew Auld <[email protected]>
Date: Mon, 7 Apr 2025 15:18:25 +0100
Subject: [PATCH] drm/amdgpu/dma_buf: fix page_link check
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

The page_link lower bits of the first sg could contain something like SG_END, if we are mapping a single VRAM page or contiguous blob which fits into one sg entry. Rather pull out the struct page, and use that in our check to know if we mapped struct pages vs VRAM.

index 9f627caedc3f..c9842a0e2a1c 100644
@@ -184,7 +184,7 @@ static void amdgpu_dma_buf_unmap(struct dma_buf_attachment *attach,
 				 struct sg_table *sgt,
 				 enum dma_data_direction dir)
 {
-	if (sgt->sgl->page_link) {
+	if (sg_page(sgt->sgl)) {
 		dma_unmap_sgtable(attach->dev, sgt, dir, 0);
 		sg_free_table(sgt);
 		kfree(sgt);