From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EFC714F9FB; Thu, 2 Apr 2026 00:45:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775090756; cv=none; b=CBYv/3NdP2TXRZn7JkXTsdicz0uT6I5qJSIJiIRGd7zjHmIQIl5nJtMnl0t9FJDRO+DyLhievOsVD6jGP5efHFMyIg4PReHf1ZGEm+9zeAviJqHI8j5u6wFD06LE3mVo7jXX8TDNVibZBamc8e16hIU1QnPmPLjiR4J5seEduoE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775090756; c=relaxed/simple; bh=pVvsWaXrzycnA45y3TLBCGTMUiskh5fVwMtFseh+E2U=; h=Date:To:From:Subject:Message-Id; b=Vy7m9PFcNFB/EDhB0JUGhH+5MaGM226vtnPCUicpJkIKBGU16gW/bQ1w0IALiRFDLOyl/jQCEFlbLY3tAehPZ+z3vB8wMbMv76B1X0NwMdDOeIfM4ak0ny4p+JIh9MLI3bLd/oDfvjqnTkjeBUVrr0/MqcujzuwcVm0pJLFop+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=RvT9RJ3e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="RvT9RJ3e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EDBF8C4CEF7; Thu, 2 Apr 2026 00:45:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1775090756; bh=pVvsWaXrzycnA45y3TLBCGTMUiskh5fVwMtFseh+E2U=; h=Date:To:From:Subject:From; b=RvT9RJ3eSUrcusx2vXahjcj1AE312MNRe4jYvrLsG9MHQDeIwOO7drJ5ZXMSE4cuV tbMOHBp2yW9liIwyZmRasm5E7SurwlSbuzhk0A8uQ5sxSQmbchuCBxy+wt1w69fyN9 tx8AmaL5f0vDUBi4/r35xqDXGdxy96n54iVMcarI= Date: Wed, 01 Apr 2026 17:45:55 -0700 To: mm-commits@vger.kernel.org,vbabka@kernel.org,surenb@google.com,stable@vger.kernel.org,shuah@kernel.org,rppt@kernel.org,pfalcato@suse.de,mhocko@suse.com,ljs@kernel.org,liam.howlett@oracle.com,jason@zx2c4.com,jannh@google.com,david@kernel.org,anthony.yznaga@oracle.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-fix-mmap-errno-value-when-map_droppable-is-not-supported.patch added to mm-new branch Message-Id: <20260402004555.EDBF8C4CEF7@smtp.kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm: fix mmap errno value when MAP_DROPPABLE is not supported has been added to the -mm mm-new branch. Its filename is mm-fix-mmap-errno-value-when-map_droppable-is-not-supported.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-fix-mmap-errno-value-when-map_droppable-is-not-supported.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Anthony Yznaga Subject: mm: fix mmap errno value when MAP_DROPPABLE is not supported Date: Wed, 1 Apr 2026 17:34:16 -0700 On configs where MAP_DROPPABLE is not supported (currently any 32-bit config except for PPC32), mmap fails with errno set to ENOTSUPP. However, ENOTSUPP is not a standard error value that userspace knows about. The acceptable userspace-visible errno to use is EOPNOTSUPP. checkpatch.pl has a warning to this affect. Link: https://lkml.kernel.org/r/20260402003417.438037-2-anthony.yznaga@oracle.com Fixes: 9651fcedf7b9 ("mm: add MAP_DROPPABLE for designating always lazily freeable mappings") Signed-off-by: Anthony Yznaga Cc: David Hildenbrand Cc: Jann Horn Cc: Jason A. Donenfeld Cc: Liam Howlett Cc: Lorenzo Stoakes (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Pedro Falcato Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Signed-off-by: Andrew Morton --- mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/mmap.c~mm-fix-mmap-errno-value-when-map_droppable-is-not-supported +++ a/mm/mmap.c @@ -504,7 +504,7 @@ unsigned long do_mmap(struct file *file, break; case MAP_DROPPABLE: if (VM_DROPPABLE == VM_NONE) - return -ENOTSUPP; + return -EOPNOTSUPP; /* * A locked or stack area makes no sense to be droppable. * _ Patches currently in -mm which might be from anthony.yznaga@oracle.com are mm-fix-mmap-errno-value-when-map_droppable-is-not-supported.patch