linux-kernel - [PATCH] bpf: Remove unused MT

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>] [day] [month] [year] [list]

Message-ID: <20241223115901.14207-1-lpieralisi@kernel.org>
Date: Mon, 23 Dec 2024 12:59:01 +0100
From: Lorenzo Pieralisi <lpieralisi@...nel.org>
To: bpf@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Andrii Nakryiko <andrii@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH] bpf: Remove unused MT_ENTRY define

The range tree introduction removed the need for maple tree usage
but missed removing the MT_ENTRY defined value that was used to
mark maple tree allocated entries.

Remove the MT_ENTRY define.

Fixes: b795379757eb ("bpf: Introduce range_tree data structure and use it in bpf arena")
Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc: Andrii Nakryiko <andrii@...nel.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Daniel Borkmann <daniel@...earbox.net>
---

Found it while looking at range tree code to possibly reuse it for
another project.

 kernel/bpf/arena.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/bpf/arena.c b/kernel/bpf/arena.c
index 945a5680f6a5..f5f6b00a982e 100644
--- a/kernel/bpf/arena.c
+++ b/kernel/bpf/arena.c
@@ -257,8 +257,6 @@ static void arena_vm_close(struct vm_area_struct *vma)
 	kfree(vml);
 }
 
-#define MT_ENTRY ((void *)&arena_map_ops) /* unused. has to be valid pointer */
-
 static vm_fault_t arena_vm_fault(struct vm_fault *vmf)
 {
 	struct bpf_map *map = vmf->vma->vm_file->private_data;
-- 
2.47.0