linux-kernel - [PATCH] cxl: don't manipulate the mm.mm

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Message-Id: <20210310174405.51044-1-ldufour@linux.ibm.com>
Date:   Wed, 10 Mar 2021 18:44:05 +0100
From:   Laurent Dufour <ldufour@...ux.ibm.com>
To:     fbarrat@...ux.ibm.com, ajd@...ux.ibm.com, arnd@...db.de,
        gregkh@...uxfoundation.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        clombard@...ux.ibm.com
Subject: [PATCH] cxl: don't manipulate the mm.mm_users field directly

It is better to rely on the API provided by the MM layer instead of
directly manipulating the mm_users field.

Signed-off-by: Laurent Dufour <ldufour@...ux.ibm.com>
---
 drivers/misc/cxl/fault.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index 01153b74334a..60c829113299 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -200,7 +200,7 @@ static struct mm_struct *get_mem_context(struct cxl_context *ctx)
 	if (ctx->mm == NULL)
 		return NULL;
 
-	if (!atomic_inc_not_zero(&ctx->mm->mm_users))
+	if (!mmget_not_zero(ctx->mm))
 		return NULL;
 
 	return ctx->mm;
-- 
2.30.1