linux-kernel - [PATCH] drm/xe/eustall: use bitmap_empty() in xe_eu_stall_stream_read

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Message-ID: <20251215235439.330124-1-yury.norov@gmail.com>
Date: Mon, 15 Dec 2025 18:54:38 -0500
From: "Yury Norov (NVIDIA)" <yury.norov@...il.com>
To: Lucas De Marchi <lucas.demarchi@...el.com>,
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Harish Chegondi <harish.chegondi@...el.com>,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: "Yury Norov (NVIDIA)" <yury.norov@...il.com>
Subject: [PATCH] drm/xe/eustall: use bitmap_empty() in xe_eu_stall_stream_read_locked()

bitmap_empty() is more verbose and efficient, as it stops traversing
data_drop mask as soon as the 1st set bit found.

Signed-off-by: Yury Norov (NVIDIA) <yury.norov@...il.com>
---
 drivers/gpu/drm/xe/xe_eu_stall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_eu_stall.c b/drivers/gpu/drm/xe/xe_eu_stall.c
index 97dfb7945b7a..b896b7ff5900 100644
--- a/drivers/gpu/drm/xe/xe_eu_stall.c
+++ b/drivers/gpu/drm/xe/xe_eu_stall.c
@@ -544,7 +544,7 @@ static ssize_t xe_eu_stall_stream_read_locked(struct xe_eu_stall_data_stream *st
 	int ret = 0;
 
 	mutex_lock(&stream->xecore_buf_lock);
-	if (bitmap_weight(stream->data_drop.mask, XE_MAX_DSS_FUSE_BITS)) {
+	if (!bitmap_empty(stream->data_drop.mask, XE_MAX_DSS_FUSE_BITS)) {
 		if (!stream->data_drop.reported_to_user) {
 			stream->data_drop.reported_to_user = true;
 			xe_gt_dbg(gt, "EU stall data dropped in XeCores: %*pb\n",
-- 
2.43.0