linux-kernel - [PATCH v2 2/2] mm/kmemleak: Use IS_ERR_PCPU() for pointer in the percpu address space

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Message-ID: <20240818210235.33481-2-ubizjak@gmail.com>
Date: Sun, 18 Aug 2024 23:01:52 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v2 2/2] mm/kmemleak: Use IS_ERR_PCPU() for pointer in the percpu address space

Use IS_ERR_PCPU() instead of IS_ERR() for pointers in the percpu address
space. The patch also fixes following sparse warnings:

kmemleak.c:1063:39: warning: cast removes address space '__percpu' of expression
kmemleak.c:1138:37: warning: cast removes address space '__percpu' of expression

Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
 mm/kmemleak.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 764b08100570..fa468809d043 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1059,8 +1059,8 @@ void __ref kmemleak_alloc_percpu(const void __percpu *ptr, size_t size,
 	 * Percpu allocations are only scanned and not reported as leaks
 	 * (min_count is set to 0).
 	 */
-	if (kmemleak_enabled && ptr && !IS_ERR(ptr))
-		create_object_percpu((unsigned long)ptr, size, 0, gfp);
+	if (kmemleak_enabled && ptr && !IS_ERR_PCPU(ptr))
+		create_object_percpu((__force unsigned long)ptr, size, 0, gfp);
 }
 EXPORT_SYMBOL_GPL(kmemleak_alloc_percpu);
 
@@ -1134,8 +1134,8 @@ void __ref kmemleak_free_percpu(const void __percpu *ptr)
 {
 	pr_debug("%s(0x%px)\n", __func__, ptr);
 
-	if (kmemleak_free_enabled && ptr && !IS_ERR(ptr))
-		delete_object_full((unsigned long)ptr, OBJECT_PERCPU);
+	if (kmemleak_free_enabled && ptr && !IS_ERR_PCPU(ptr))
+		delete_object_full((__force unsigned long)ptr, OBJECT_PERCPU);
 }
 EXPORT_SYMBOL_GPL(kmemleak_free_percpu);
 
-- 
2.42.0