linux-kernel - [PATCH 1/8] Uprobe: Export vaddr <-> offset conversion functions

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Message-Id: <20180313125603.19819-2-ravi.bangoria@linux.vnet.ibm.com>
Date:   Tue, 13 Mar 2018 18:25:56 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     mhiramat@...nel.org, oleg@...hat.com, peterz@...radead.org,
        srikar@...ux.vnet.ibm.com
Cc:     acme@...nel.org, ananth@...ux.vnet.ibm.com,
        akpm@...ux-foundation.org, alexander.shishkin@...ux.intel.com,
        alexis.berlemont@...il.com, corbet@....net,
        dan.j.williams@...el.com, gregkh@...uxfoundation.org,
        huawei.libin@...wei.com, hughd@...gle.com, jack@...e.cz,
        jglisse@...hat.com, jolsa@...hat.com, kan.liang@...el.com,
        kirill.shutemov@...ux.intel.com, kjlx@...pleofstupid.com,
        kstewart@...uxfoundation.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, mhocko@...e.com,
        milian.wolff@...b.com, mingo@...hat.com, namhyung@...nel.org,
        naveen.n.rao@...ux.vnet.ibm.com, pc@...ibm.com,
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        tmricht@...ux.vnet.ibm.com, willy@...radead.org,
        yao.jin@...ux.intel.com, fengguang.wu@...el.com,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: [PATCH 1/8] Uprobe: Export vaddr <-> offset conversion functions

No functionality changes.

Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
---
 include/linux/mm.h      | 12 ++++++++++++
 kernel/events/uprobes.c | 10 ----------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ad06d42..95909f2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2274,6 +2274,18 @@ struct vm_unmapped_area_info {
 		return unmapped_area(info);
 }
 
+static inline unsigned long
+offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
+{
+	return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+}
+
+static inline loff_t
+vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
+{
+	return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start);
+}
+
 /* truncate.c */
 extern void truncate_inode_pages(struct address_space *, loff_t);
 extern void truncate_inode_pages_range(struct address_space *,
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index ce6848e..bd6f230 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -130,16 +130,6 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
 	return vma->vm_file && (vma->vm_flags & flags) == VM_MAYEXEC;
 }
 
-static unsigned long offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
-{
-	return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
-}
-
-static loff_t vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
-{
-	return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start);
-}
-
 /**
  * __replace_page - replace page in vma by new page.
  * based on replace_page in mm/ksm.c
-- 
1.8.3.1