From: Huaisheng Ye <yehs2007@zoho.com>
To: linux-nvdimm@lists.01.org, dan.j.williams@intel.com
Cc: axboe@kernel.dk, linux-s390@vger.kernel.org, chengnt@lenovo.com,
linux-fsdevel@vger.kernel.org, heiko.carstens@de.ibm.com,
linux-kernel@vger.kernel.org, willy@infradead.org,
bart.vanassche@wdc.com, viro@zeniv.linux.org.uk,
gregkh@linuxfoundation.org, schwidefsky@de.ibm.com, jack@suse.cz
Subject: [PATCH 4/5] filesystem-dax: Do not request a pointer kaddr when not required
Date: Tue, 24 Jul 2018 16:45:09 +0800 [thread overview]
Message-ID: <20180724084510.6104-5-yehs2007@zoho.com> (raw)
In-Reply-To: <20180724084510.6104-1-yehs2007@zoho.com>
From: Huaisheng Ye <yehs1@lenovo.com>
Some functions within fs/dax don't need to get pointer kaddr from
direct_access. In support of allowing memmap initialization to run
in the background elide requests for pointer kaddr when not required.
Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
---
fs/dax.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index aaec72de..abdb9e2 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -870,7 +870,6 @@ static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size,
{
const sector_t sector = dax_iomap_sector(iomap, pos);
pgoff_t pgoff;
- void *kaddr;
int id, rc;
long length;
@@ -879,7 +878,7 @@ static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size,
return rc;
id = dax_read_lock();
length = dax_direct_access(iomap->dax_dev, pgoff, PHYS_PFN(size),
- &kaddr, pfnp);
+ NULL, pfnp);
if (length < 0) {
rc = length;
goto out;
--
1.8.3.1
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next prev parent reply other threads:[~2018-07-24 8:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 8:45 [PATCH 0/5] Do not request a pointer kaddr when not required Huaisheng Ye
2018-07-24 8:45 ` [PATCH 1/5] libnvdimm, pmem: Allow a NULL-kaddr to ->direct_access() Huaisheng Ye
2018-07-24 8:45 ` [PATCH 2/5] tools/testing/nvdimm: " Huaisheng Ye
2018-07-24 8:45 ` [PATCH 3/5] s390, dcssblk: " Huaisheng Ye
2018-07-24 8:53 ` Christian Borntraeger
2018-07-24 9:46 ` [External] " Huaisheng HS1 Ye
2018-07-24 11:16 ` Christian Borntraeger
2018-07-24 14:28 ` Huaisheng HS1 Ye
2018-07-24 8:45 ` Huaisheng Ye [this message]
2018-07-24 8:45 ` [PATCH 5/5] dax/super: Do not request a pointer kaddr when not required Huaisheng Ye
2018-07-24 14:50 ` [PATCH 0/5] " Ross Zwisler
2018-07-24 15:41 ` [External] " Huaisheng HS1 Ye
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