Patch "s390/cpum_sf: Remove WARN_ON_ONCE statements" has been added to the 6.11-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    s390/cpum_sf: Remove WARN_ON_ONCE statements

to the 6.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-cpum_sf-remove-warn_on_once-statements.patch
and it can be found in the queue-6.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 0449a205752fa604a91efe1d6595e5aa770bfd12
Author: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Date:   Wed Jul 10 12:23:47 2024 +0200

    s390/cpum_sf: Remove WARN_ON_ONCE statements
    
    [ Upstream commit b495e710157606889f2d8bdc62aebf2aa02f67a7 ]
    
    Remove WARN_ON_ONCE statements. These have not triggered in the
    past.
    
    Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
    Acked-by: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
    Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
    Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
    Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
    Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 736c1d9632dd5..48fa9471660a8 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1463,7 +1463,7 @@ static int aux_output_begin(struct perf_output_handle *handle,
 	unsigned long range, i, range_scan, idx, head, base, offset;
 	struct hws_trailer_entry *te;
 
-	if (WARN_ON_ONCE(handle->head & ~PAGE_MASK))
+	if (handle->head & ~PAGE_MASK)
 		return -EINVAL;
 
 	aux->head = handle->head >> PAGE_SHIFT;
@@ -1642,7 +1642,7 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
 	unsigned long num_sdb;
 
 	aux = perf_get_aux(handle);
-	if (WARN_ON_ONCE(!aux))
+	if (!aux)
 		return;
 
 	/* Inform user space new data arrived */
@@ -1661,7 +1661,7 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
 				num_sdb);
 			break;
 		}
-		if (WARN_ON_ONCE(!aux))
+		if (!aux)
 			return;
 
 		/* Update head and alert_mark to new position */
@@ -1896,12 +1896,8 @@ static void cpumsf_pmu_start(struct perf_event *event, int flags)
 {
 	struct cpu_hw_sf *cpuhw = this_cpu_ptr(&cpu_hw_sf);
 
-	if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED)))
+	if (!(event->hw.state & PERF_HES_STOPPED))
 		return;
-
-	if (flags & PERF_EF_RELOAD)
-		WARN_ON_ONCE(!(event->hw.state & PERF_HES_UPTODATE));
-
 	perf_pmu_disable(event->pmu);
 	event->hw.state = 0;
 	cpuhw->lsctl.cs = 1;