linux-kernel - [PATCH] mm: Deduplicate mm_get_unmapped

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250627160739.2124768-1-peterx@redhat.com>
Date: Fri, 27 Jun 2025 12:07:39 -0400
From: Peter Xu <peterx@...hat.com>
To: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Cc: peterx@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Jann Horn <jannh@...gle.com>,
	Pedro Falcato <pfalcato@...e.de>,
	Jason Gunthorpe <jgg@...dia.com>,
	Oscar Salvador <osalvador@...e.de>,
	Zi Yan <ziy@...dia.com>,
	David Hildenbrand <david@...hat.com>
Subject: [PATCH] mm: Deduplicate mm_get_unmapped_area()

Essentially it sets vm_flags==0 for mm_get_unmapped_area_vmflags().  Use
the helper instead to dedup the lines.

Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Jann Horn <jannh@...gle.com>
Cc: Pedro Falcato <pfalcato@...e.de>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Reviewed-by: Oscar Salvador <osalvador@...e.de>
Reviewed-by: Zi Yan <ziy@...dia.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Reviewed-by: Pedro Falcato <pfalcato@...e.de>
Acked-by: David Hildenbrand <david@...hat.com>
Signed-off-by: Peter Xu <peterx@...hat.com>
---
 mm/mmap.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 8f92cf10b656..74072369e8fd 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -871,9 +871,8 @@ mm_get_unmapped_area(struct mm_struct *mm, struct file *file,
 		     unsigned long addr, unsigned long len,
 		     unsigned long pgoff, unsigned long flags)
 {
-	if (test_bit(MMF_TOPDOWN, &mm->flags))
-		return arch_get_unmapped_area_topdown(file, addr, len, pgoff, flags, 0);
-	return arch_get_unmapped_area(file, addr, len, pgoff, flags, 0);
+	return mm_get_unmapped_area_vmflags(mm, file, addr, len,
+					    pgoff, flags, 0);
 }
 EXPORT_SYMBOL(mm_get_unmapped_area);
 
-- 
2.49.0