Message ID | 20210428153542.2814175-63-Liam.Howlett@Oracle.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Wed, 28 Apr 2021 15:37:19 +0000 Received: from MWHPR10MB1582.namprd10.prod.outlook.com ([fe80::353a:1802:6e91:1811]) by MWHPR10MB1582.namprd10.prod.outlook.com ([fe80::353a:1802:6e91:1811%8]) with mapi id 15.20.4065.027; Wed, 28 Apr 2021 15:37:19 +0000 From: Liam Howlett <liam.howlett@oracle.com> To: "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org> CC: Song Liu <songliubraving@fb.com>, Davidlohr Bueso <dave@stgolabs.net>, "Paul E . McKenney" <paulmck@kernel.org>, Matthew Wilcox <willy@infradead.org>, Laurent Dufour <ldufour@linux.ibm.com>, David Rientjes <rientjes@google.com>, Axel Rasmussen <axelrasmussen@google.com>, Suren Baghdasaryan <surenb@google.com>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@surriel.com>, Peter Zijlstra <peterz@infradead.org>, Michel Lespinasse <walken.cr@gmail.com>, Liam Howlett <liam.howlett@oracle.com> Subject: [PATCH 62/94] fs/binfmt_elf: Use maple tree iterators for fill_files_note() Thread-Topic: [PATCH 62/94] fs/binfmt_elf: Use maple tree iterators for fill_files_note() Thread-Index: AQHXPEQ78tnKIMhDQk2BxDDWZrK9FQ== Date: Wed, 28 Apr 2021 15:36:19 +0000 Message-ID: <20210428153542.2814175-63-Liam.Howlett@Oracle.com> References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> In-Reply-To: <20210428153542.2814175-1-Liam.Howlett@Oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 authentication-results: lists.infradead.org; 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Series |
Introducing the Maple Tree
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expand
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diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 187b3f2b9202..264e37903949 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1612,6 +1612,7 @@ static int fill_files_note(struct memelfnote *note) user_long_t *data; user_long_t *start_end_ofs; char *name_base, *name_curpos; + MA_STATE(mas, &mm->mm_mt, 0, 0); /* *Estimated* file count and total data size needed */ count = mm->map_count; @@ -1636,7 +1637,8 @@ static int fill_files_note(struct memelfnote *note) name_base = name_curpos = ((char *)data) + names_ofs; remaining = size - names_ofs; count = 0; - for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { struct file *file; const char *filename; @@ -1665,6 +1667,7 @@ static int fill_files_note(struct memelfnote *note) *start_end_ofs++ = vma->vm_pgoff; count++; } + rcu_read_unlock(); /* Now we know exact count of files, can store it */ data[0] = count;
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> --- fs/binfmt_elf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)