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From:   =?UTF-8?Q?Thomas_Hellstr=c3=b6m_=28VMware=29?= 
        <thomas_os@shipmail.org>
Subject: Ack to merge through DRM? WAS [PATCH v5 1/9] fs: Constify vma
 argument to vma_is_dax
To:     Alexander Viro <viro@zeniv.linux.org.uk>
Cc:     linux-fsdevel@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
References: <20200303102247.4635-1-thomas_os@shipmail.org>
Organization: VMware Inc.
Message-ID: <4a49f27b-71a6-0e61-70d9-5fcb6cd58c3f@shipmail.org>
Date:   Tue, 3 Mar 2020 11:28:48 +0100
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Alexander,

Could you ack merging the below patch through a DRM tree?

Thanks,

Thomas Hellstrom


From: Thomas Hellstrom <thellstrom@vmware.com>


The function is used by upcoming vma_is_special_huge() with which we want
to use a const vma argument. Since for vma_is_dax() the vma argument is
only dereferenced for reading, constify it.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Acked-by: Christian König <christian.koenig@amd.com>
---
include/linux/fs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3cd4fe6b845e..2b38ce5b73ad 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3391,7 +3391,7 @@ static inline bool io_is_direct(struct file *filp)
return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
}
-static inline bool vma_is_dax(struct vm_area_struct *vma)
+static inline bool vma_is_dax(const struct vm_area_struct *vma)
{
return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
}

-- 
2.21.1

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