[PATCH v2 5/9] Uprobe: Export uprobe_map_info along with uprobe_{build/free}_map_info()

[Ravi Bangoria]

Given the file(inode) and offset, build_map_info() finds all
existing mm that map the portion of file containing offset.

Exporting these functions and data structure will help to use
them in other set of files.

Signed-off-by: Ravi Bangoria <ravi.bango...@linux.vnet.ibm.com>
Reviewed-by: Jérôme Glisse <jgli...@redhat.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 477dc42..096d1e6 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -695,14 +695,7 @@ 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;
        mmput(info->mm);
@@ -710,9 +703,8 @@ struct uprobe_map_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

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