From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 031B52BB1D; Sat, 23 May 2026 17:54:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779558896; cv=none; b=HGocYCCnP1uwqDFzGq35kKVHixvqHrPmyflKgQpLPcH927sF7Vf69+bbIG8WDFC7idwpkgAZZJaeXCxYm2DIxFW5X5/CZcaCxpWCLm19jLW4UkKh/cgHv5hsXc1nnkbX4psx7HRcBH3Qyfr8Md1m0qghncxy2OIK+mZUNq/WhMs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779558896; c=relaxed/simple; bh=zjzC6WZgyCQNvgmUsQfpb6/kcemhlapPaIznXJ6qDpY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=kYRWohvpnpnD3UW/Hb8/VQ6vrbjEbxT9SQGUULr3Nh2TqRp9oeTMUB05B173dageRqe5kTweqRBUbRb6fNCp/6Ekyi2/dnTCnPkLUCrliZ+1GNOqGndQa/52t3k8OGEBkvPaUXwYGg5hPozhg4T63ZU1xE6ZO0dyzhjh6mFspfw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bGH8ECXZ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bGH8ECXZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D93D61F000E9; Sat, 23 May 2026 17:54:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779558894; bh=7bBokGp6YKVtCQZrud5e4II/4wZ3rZBymvn2I3mXFbw=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=bGH8ECXZQWVB8xYKDY/34dL7P/Mpormzto6UFwYqmQQ8V7u/iWPHMQTPBkPItAfkE JYt1o4Cf3CN+cxfmAzr35RKANhG/cmjfmksUsM7WzHVSpgYMHN3Gf0ZuFv44EHsQkG 5c6hR6iM1fBLLGWl1087vym9DDLVALaOOffnORm0ZfnH5ybe1PyWRRQEeu90AKgoDB Jw2dFEijdb+pzOPHlcGU7KJWjzyYOiV43iwFqaQc4PwA8Zbp5ATunapeAj83YgVs7z H3BqQnMH2LDOG2MvAZHZvX6Ua6wiohmfMIA9nYPkFYfAuWtOIlr24mdMezTmn2Hvz9 pETrQg4iAiu/A== From: "Mike Rapoport (Microsoft)" Date: Sat, 23 May 2026 20:54:14 +0300 Subject: [PATCH 02/17] proc: replace __get_free_page() with kmalloc() Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260523-b4-fs-v1-2-275e36a83f0e@kernel.org> References: <20260523-b4-fs-v1-0-275e36a83f0e@kernel.org> In-Reply-To: <20260523-b4-fs-v1-0-275e36a83f0e@kernel.org> To: Jan Kara , Mark Fasheh , Joel Becker , Joseph Qi , Ryusuke Konishi , Viacheslav Dubeyko , Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Alexander Viro , Christian Brauner , Jan Kara , Dave Kleikamp , Theodore Ts'o , Miklos Szeredi , Andreas Hindborg , Breno Leitao , Kees Cook , "Tigran A. Aivazian" Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@lists.linux.dev, linux-nilfs@vger.kernel.org, linux-nfs@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-ext4@vger.kernel.org, linux-mm@kvack.org, "Mike Rapoport (Microsoft)" X-Mailer: b4 0.15.2 A few functions in fs/proc/base.c use __get_free_page() to allocate a temporary buffer. kmalloc() is a better API for such use and it also provides better scalability and more debugging possibilities. Replace use of __get_free_page() with kmalloc(). Signed-off-by: Mike Rapoport (Microsoft) --- fs/proc/base.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index d9acfa89c894..e129dc509b79 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -261,7 +261,7 @@ static ssize_t get_mm_proctitle(struct mm_struct *mm, char __user *buf, if (pos >= PAGE_SIZE) return 0; - page = (char *)__get_free_page(GFP_KERNEL); + page = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!page) return -ENOMEM; @@ -284,7 +284,7 @@ static ssize_t get_mm_proctitle(struct mm_struct *mm, char __user *buf, ret = len; } } - free_page((unsigned long)page); + kfree(page); return ret; } @@ -347,7 +347,7 @@ static ssize_t get_mm_cmdline(struct mm_struct *mm, char __user *buf, if (count > arg_end - pos) count = arg_end - pos; - page = (char *)__get_free_page(GFP_KERNEL); + page = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!page) return -ENOMEM; @@ -371,7 +371,7 @@ static ssize_t get_mm_cmdline(struct mm_struct *mm, char __user *buf, count -= got; } - free_page((unsigned long)page); + kfree(page); return len; } @@ -908,7 +908,7 @@ static ssize_t mem_rw(struct file *file, char __user *buf, if (!mm) return 0; - page = (char *)__get_free_page(GFP_KERNEL); + page = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!page) return -ENOMEM; @@ -949,7 +949,7 @@ static ssize_t mem_rw(struct file *file, char __user *buf, mmput(mm); free: - free_page((unsigned long) page); + kfree(page); return copied; } @@ -1016,7 +1016,7 @@ static ssize_t environ_read(struct file *file, char __user *buf, if (!mm || !mm->env_end) return 0; - page = (char *)__get_free_page(GFP_KERNEL); + page = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!page) return -ENOMEM; @@ -1062,7 +1062,7 @@ static ssize_t environ_read(struct file *file, char __user *buf, mmput(mm); free: - free_page((unsigned long) page); + kfree(page); return ret; } -- 2.53.0