linux-kernel - [PATCH 4/8] Uprobe: Export uprobe_map_info along with uprobe_{build/free}_map

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Date:   Tue, 13 Mar 2018 18:25:59 +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,
        pombredanne@...b.com, rostedt@...dmis.org, tglx@...utronix.de,
        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 4/8] Uprobe: Export uprobe_map_info along with uprobe_{build/free}_map_info()

These exported data structure and functions will be used by other
files in later patches.

No functionality changes.

Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
---
 include/linux/uprobes.h |  9 +++++++++
 kernel/events/uprobes.c | 14 +++-----------
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 0a294e9..7bd2760 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -109,12 +109,19 @@ enum rp_check {
 	RP_CHECK_RET,
 };
 
+struct address_space;
 struct xol_area;
 
 struct uprobes_state {
 	struct xol_area		*xol_area;
 };
 
+struct uprobe_map_info {
+	struct uprobe_map_info *next;
+	struct mm_struct *mm;
+	unsigned long vaddr;
+};
+
 extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
 extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
 extern bool is_swbp_insn(uprobe_opcode_t *insn);
@@ -149,6 +156,8 @@ struct uprobes_state {
 extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
 extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
 					 void *src, unsigned long len);
+extern struct uprobe_map_info *uprobe_free_map_info(struct uprobe_map_info *info);
+extern struct uprobe_map_info *uprobe_build_map_info(struct address_space *mapping, loff_t offset, bool is_register);
 #else /* !CONFIG_UPROBES */
 struct uprobes_state {
 };
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 081b88c1..e7830b8 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -695,23 +695,15 @@ static void delete_uprobe(struct uprobe *uprobe)
 	put_uprobe(uprobe);
 }
 
-struct uprobe_map_info {
-	struct uprobe_map_info *next;
-	struct mm_struct *mm;
-	unsigned long vaddr;
-};
-
-static inline struct uprobe_map_info *
-uprobe_free_map_info(struct uprobe_map_info *info)
+struct uprobe_map_info *uprobe_free_map_info(struct uprobe_map_info *info)
 {
 	struct uprobe_map_info *next = info->next;
 	kfree(info);
 	return next;
 }
 
-static struct uprobe_map_info *
-uprobe_build_map_info(struct address_space *mapping, loff_t offset,
-		      bool is_register)
+struct uprobe_map_info *uprobe_build_map_info(struct address_space *mapping,
+					      loff_t offset, bool is_register)
 {
 	unsigned long pgoff = offset >> PAGE_SHIFT;
 	struct vm_area_struct *vma;
-- 
1.8.3.1