From: Matthew Wilcox <willy@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>,
Nicolas Pitre <nicolas.pitre@linaro.org>,
Souptick Joarder <jrdr.linux@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 10/10] mm: Convert insert_pfn to vm_fault_t
Date: Tue, 28 Aug 2018 07:57:28 -0700 [thread overview]
Message-ID: <20180828145728.11873-11-willy@infradead.org> (raw)
In-Reply-To: <20180828145728.11873-1-willy@infradead.org>
All callers convert its errno into a vm_fault_t, so convert it to
return a vm_fault_t directly.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
---
mm/memory.c | 24 +++++-------------------
1 file changed, 5 insertions(+), 19 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c
index 9fef202b4ea7..368b65390762 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1767,19 +1767,16 @@ int vm_insert_page(struct vm_area_struct *vma, unsigned long addr,
}
EXPORT_SYMBOL(vm_insert_page);
-static int insert_pfn(struct vm_area_struct *vma, unsigned long addr,
+static vm_fault_t insert_pfn(struct vm_area_struct *vma, unsigned long addr,
pfn_t pfn, pgprot_t prot, bool mkwrite)
{
struct mm_struct *mm = vma->vm_mm;
- int retval;
pte_t *pte, entry;
spinlock_t *ptl;
- retval = -ENOMEM;
pte = get_locked_pte(mm, addr, &ptl);
if (!pte)
- goto out;
- retval = -EBUSY;
+ return VM_FAULT_OOM;
if (!pte_none(*pte)) {
if (mkwrite) {
/*
@@ -1812,11 +1809,9 @@ static int insert_pfn(struct vm_area_struct *vma, unsigned long addr,
set_pte_at(mm, addr, pte, entry);
update_mmu_cache(vma, addr, pte); /* XXX: why not for insert_page? */
- retval = 0;
out_unlock:
pte_unmap_unlock(pte, ptl);
-out:
- return retval;
+ return VM_FAULT_NOPAGE;
}
/**
@@ -1840,8 +1835,6 @@ static int insert_pfn(struct vm_area_struct *vma, unsigned long addr,
vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
unsigned long pfn, pgprot_t pgprot)
{
- int err;
-
/*
* Technically, architectures with pte_special can avoid all these
* restrictions (same for remap_pfn_range). However we would like
@@ -1862,15 +1855,8 @@ vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
track_pfn_insert(vma, &pgprot, __pfn_to_pfn_t(pfn, PFN_DEV));
- err = insert_pfn(vma, addr, __pfn_to_pfn_t(pfn, PFN_DEV), pgprot,
+ return insert_pfn(vma, addr, __pfn_to_pfn_t(pfn, PFN_DEV), pgprot,
false);
-
- if (err == -ENOMEM)
- return VM_FAULT_OOM;
- if (err < 0 && err != -EBUSY)
- return VM_FAULT_SIGBUS;
-
- return VM_FAULT_NOPAGE;
}
EXPORT_SYMBOL(vmf_insert_pfn_prot);
@@ -1950,7 +1936,7 @@ static vm_fault_t __vm_insert_mixed(struct vm_area_struct *vma,
page = pfn_to_page(pfn_t_to_pfn(pfn));
err = insert_page(vma, addr, page, pgprot);
} else {
- err = insert_pfn(vma, addr, pfn, pgprot, mkwrite);
+ return insert_pfn(vma, addr, pfn, pgprot, mkwrite);
}
if (err == -ENOMEM)
--
2.18.0
prev parent reply other threads:[~2018-08-28 14:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 14:57 [PATCH 00/10] Push the vm_fault_t conversion further Matthew Wilcox
2018-08-28 14:57 ` [PATCH 01/10] cramfs: Convert to use vmf_insert_mixed Matthew Wilcox
2018-08-28 17:49 ` Nicolas Pitre
2018-08-28 22:04 ` Matthew Wilcox
2018-08-28 23:52 ` Nicolas Pitre
2018-08-28 14:57 ` [PATCH 02/10] mm: Remove vm_insert_mixed Matthew Wilcox
2018-08-28 14:57 ` [PATCH 03/10] mm: Introduce vmf_insert_pfn_prot Matthew Wilcox
2018-08-28 14:57 ` [PATCH 04/10] x86: Convert vdso to use vm_fault_t Matthew Wilcox
2018-08-28 14:57 ` [PATCH 05/10] mm: Make vm_insert_pfn_prot static Matthew Wilcox
2018-08-28 14:57 ` [PATCH 06/10] mm: Remove references to vm_insert_pfn Matthew Wilcox
2018-08-28 14:57 ` [PATCH 07/10] mm: Remove vm_insert_pfn Matthew Wilcox
2018-08-28 14:57 ` [PATCH 08/10] mm: Inline vm_insert_pfn_prot into caller Matthew Wilcox
2018-08-28 14:57 ` [PATCH 09/10] mm: Convert __vm_insert_mixed to vm_fault_t Matthew Wilcox
2018-08-28 14:57 ` Matthew Wilcox [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180828145728.11873-11-willy@infradead.org \
--to=willy@infradead.org \
--cc=akpm@linux-foundation.org \
--cc=jrdr.linux@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=nicolas.pitre@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).