FAILED: patch "[PATCH] drm/xe/rtp: Toggle 'deny' bit to (de-)whitelist OA regs" failed to apply to 6.18-stable tree

The patch below does not apply to the 6.18-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-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x b422babd77fac2c96b92db484050e460899bddaf
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026072921-approve-resample-c172@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

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

From b422babd77fac2c96b92db484050e460899bddaf Mon Sep 17 00:00:00 2001
From: Ashutosh Dixit <[email protected]>
Date: Mon, 15 Jun 2026 15:42:24 -0700
Subject: [PATCH] drm/xe/rtp: Toggle 'deny' bit to (de-)whitelist OA regs
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Whitelist or de-whitelist OA registers by setting or resetting the 'deny' bit in OA nonpriv registers and writing new register values to HW.

index 76ac23644a4d..7186998df498 100644
@@ -229,6 +229,21 @@ void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe)
 	whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->reg_sr, first_oa_slot);
 }
 
+__maybe_unused static void __whitelist_oa_regs(struct xe_hw_engine *hwe, bool whitelist)
+{
+	struct xe_reg_sr_entry *entry;
+	unsigned long reg;
+
+	xa_for_each(&hwe->oa_sr.xa, reg, entry) {
+		if (whitelist)
+			entry->set_bits &= ~RING_FORCE_TO_NONPRIV_DENY;
+		else
+			entry->set_bits |= RING_FORCE_TO_NONPRIV_DENY;
+	}
+
+	xe_reg_sr_apply_mmio(&hwe->oa_sr, hwe->gt);
+}
+
 /**
  * xe_reg_whitelist_print_entry - print one whitelist entry
  * @p: DRM printer