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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	[thread overview]
Message-ID: <20221204013046.154960-8-bhe@redhat.com> (raw)
In-Reply-To: <20221204013046.154960-1-bhe@redhat.com>

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



      parent reply	other threads:[~2022-12-04  1:31 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-04  1:30 [PATCH v1 0/7] mm/vmalloc.c: allow vread() to read out vm_map_ram areas Baoquan He
2022-12-04  1:30 ` [PATCH v1 1/7] mm/vmalloc.c: add used_map into vmap_block to track space of vmap_block Baoquan He
2022-12-04  1:30 ` [PATCH v1 2/7] mm/vmalloc.c: add flags to mark vm_map_ram area Baoquan He
2022-12-05 12:56   ` Uladzislau Rezki
2022-12-07  8:03     ` Baoquan He
2022-12-08 19:52       ` Uladzislau Rezki
2022-12-09  8:27         ` Baoquan He
2022-12-04  1:30 ` [PATCH v1 3/7] mm/vmalloc.c: allow vread() to read out vm_map_ram areas Baoquan He
2022-12-04  3:47   ` kernel test robot
2022-12-17  1:14     ` Baoquan He
2022-12-04  1:30 ` [PATCH v1 4/7] mm/vmalloc: explicitly identify vm_map_ram area when shown in /proc/vmcoreinfo Baoquan He
2022-12-04  1:30 ` [PATCH v1 5/7] mm/vmalloc: skip the uninitilized vmalloc areas Baoquan He
2022-12-04  1:30 ` [PATCH v1 6/7] powerpc: mm: add VM_IOREMAP flag to the vmalloc area Baoquan He
2022-12-04  1:30 ` Baoquan He [this message]

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