Subject: [PATCH] scs: Report SCS usage in bytes rather than number of entries

From: Will Deacon <[email-masked]>
Date: Wed, 3 Jun 2020 16:12:17 +0100

Fix the SCS debug usage check so that we report the number of bytes
usedm, rather than the number of entries.

Fixes: 5bbaf9d1fcb9 ("scs: Add support for stack usage debugging")
Reported-by: Sami Tolvanen <[email-masked]>
Signed-off-by: Will Deacon <[email-masked]>
---
 kernel/scs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/scs.c b/kernel/scs.c
index 222a7a9ad543..5d4d9bbdec36 100644
--- a/kernel/scs.c
+++ b/kernel/scs.c
@@ -74,7 +74,7 @@ static void scs_check_usage(struct task_struct *tsk)
 	for (p = task_scs(tsk); p < __scs_magic(tsk); ++p) {
 		if (!READ_ONCE_NOCHECK(*p))
 			break;
-		used++;
+		used += sizeof(*p);
 	}
 
 	while (used > curr) {
-- 
2.27.0.rc2.251.g90737beb825-goog

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