linux-kernel - [PATCH 2/2] Fix assgining cma_area

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Message-ID: <775ae3ba4f7034a78769559fa1a3542a@ercanersoy.net>
Date:   Sun, 09 Jan 2022 10:39:19 +0300
From:   Ercan Ersoy <ercanersoy@...anersoy.net>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, akpm@...ux-foundation.org
Subject: [PATCH 2/2] Fix assgining cma_area_count


I have patched "Contiguous Memory Allocator" of Linux kernel.

This fix of patch is for cma_init_reserved_mem function in
mm/cma.c source file as creating area without specific name.

Without fix may be a problem a lot of cma as next cma2147483647 naming.
Without fix may be a problem huge memory systems.

I think after "cma2147483647" naming is "cma-2147483648".

Thanks for interesting,
Ercan

--- START PATCH ---
 From 5d3d01a3a0f7339617d1df945c0bd0ec1ab91ae3 Mon Sep 17 00:00:00 2001
 From: Ercan Ersoy <ercanersoy@...anersoy.net>
Date: Sun, 9 Jan 2022 10:01:14 +0300
Subject: [PATCH 2/2] Fix assgining cma_area_count

Fix assigning to cma->name in cma_init_reserved_mem function
in mm/cma.c source file.

Signed-off-by: Ercan Ersoy <ercanersoy@...anersoy.net>
---
  mm/cma.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/cma.c b/mm/cma.c
index bc9ca8f3c487..03f01d1f1b57 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -199,7 +199,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, 
phys_addr_t size,
  	if (name)
  		snprintf(cma->name, CMA_MAX_NAME, name);
  	else
-		snprintf(cma->name, CMA_MAX_NAME,  "cma%d\n", cma_area_count);
+		snprintf(cma->name, CMA_MAX_NAME,  "cma%u\n", cma_area_count);

  	cma->base_pfn = PFN_DOWN(base);
  	cma->count = size >> PAGE_SHIFT;
-- 
2.30.2


--- END PATCH ---