Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Baoquan He <bhe@redhat.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-mm@kvack.org, stephen.s.brennan@oracle.com, urezki@gmail.com,
        willy@infradead.org, akpm@linux-foundation.org, hch@infradead.org,
        Baoquan He <bhe@redhat.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Rich Felker <dalias@libc.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-sh@vger.kernel.org
Subject: [PATCH v1 7/7] sh: mm: set VM_IOREMAP flag to the vmalloc area
Date:   Sun,  4 Dec 2022 09:30:46 +0800
Message-Id: <20221204013046.154960-8-bhe@redhat.com>
In-Reply-To: <20221204013046.154960-1-bhe@redhat.com>
References: <20221204013046.154960-1-bhe@redhat.com>
MIME-Version: 1.0
Content-type: text/plain
Content-Transfer-Encoding: 8bit
Precedence: bulk

Currently, for vmalloc areas with flag VM_IOREMAP set, except of the
specific alignment clamping in __get_vm_area_node(), they will be
1) Shown as ioremap in /proc/vmallocinfo;
2) Ignored by /proc/kcore reading via vread()

So for the ioremap in __sq_remap() of sh, we should set VM_IOREMAP
in flag to make it handled correctly as above.

Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-sh@vger.kernel.org (open list:SUPERH)
---
 arch/sh/kernel/cpu/sh4/sq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index a76b94e41e91..27f2e3da5aa2 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -103,7 +103,7 @@ static int __sq_remap(struct sq_mapping *map, pgprot_t prot)
 #if defined(CONFIG_MMU)
 	struct vm_struct *vma;
 
-	vma = __get_vm_area_caller(map->size, VM_ALLOC, map->sq_addr,
+	vma = __get_vm_area_caller(map->size, VM_IOREMAP, map->sq_addr,
 			SQ_ADDRMAX, __builtin_return_address(0));
 	if (!vma)
 		return -ENOMEM;
-- 
2.34.1