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From: Yang Shi <yang.shi@linux.alibaba.com>
To: mhocko@kernel.org, willy@infradead.org,
	ldufour@linux.vnet.ibm.com, kirill@shutemov.name, vbabka@suse.cz,
	akpm@linux-foundation.org, peterz@infradead.org,
	mingo@redhat.com, acme@kernel.org,
	alexander.shishkin@linux.intel.com, jolsa@redhat.com,
	namhyung@kernel.org
Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: [RFC v7 PATCH 3/4] uprobes: make vma_has_uprobes non-static
Date: Fri, 10 Aug 2018 07:36:02 +0800
Message-ID: <1533857763-43527-4-git-send-email-yang.shi@linux.alibaba.com> (raw)
In-Reply-To: <1533857763-43527-1-git-send-email-yang.shi@linux.alibaba.com>

vma_has_uprobes() will be used in the following patch to check if a vma
could be unmapped with holding read mmap_sem, but it is static. So, make
it non-static to use outside uprobe.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
---
 include/linux/uprobes.h | 7 +++++++
 kernel/events/uprobes.c | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 0a294e9..caeb26b 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -149,6 +149,8 @@ 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 bool vma_has_uprobes(struct vm_area_struct *vma, unsigned long start,
+			    unsigned long end);
 #else /* !CONFIG_UPROBES */
 struct uprobes_state {
 };
@@ -203,5 +205,10 @@ static inline void uprobe_copy_process(struct task_struct *t, unsigned long flag
 static inline void uprobe_clear_state(struct mm_struct *mm)
 {
 }
+static inline bool vma_has_uprobes(struct vm_area_struct *vma, unsigned long start,
+				   unsigned long end)
+{
+	return false;
+}
 #endif /* !CONFIG_UPROBES */
 #endif	/* _LINUX_UPROBES_H */
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index ccc579a..4880c46 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1095,7 +1095,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
 	return 0;
 }
 
-static bool
+bool
 vma_has_uprobes(struct vm_area_struct *vma, unsigned long start, unsigned long end)
 {
 	loff_t min, max;
-- 
1.8.3.1


  parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-09 23:35 [RFC v7 PATCH 0/4] mm: zap pages with read mmap_sem in munmap for large mapping Yang Shi
2018-08-09 23:36 ` [RFC v7 PATCH 1/4] mm: refactor do_munmap() to extract the common part Yang Shi
2018-08-10 10:20   ` Vlastimil Babka
2018-08-10 17:41   ` Matthew Wilcox
2018-08-10 18:23     ` Yang Shi
2018-08-09 23:36 ` [RFC v7 PATCH 2/4] mm: mmap: zap pages with read mmap_sem in munmap Yang Shi
2018-08-10 17:57   ` Matthew Wilcox
2018-08-10 18:26     ` Yang Shi
2018-08-09 23:36 ` Yang Shi [this message]
2018-08-09 23:36 ` [RFC v7 PATCH 4/4] mm: unmap special vmas with regular do_munmap() Yang Shi
2018-08-10  9:51   ` Vlastimil Babka
2018-08-10 11:59     ` Michal Hocko
2018-08-10 16:51     ` Yang Shi
2018-08-10 10:46   ` Vlastimil Babka
2018-08-10 17:00     ` Yang Shi

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