ipc/shm: use VMA iterator instead of linked list
authorLiam R. Howlett <Liam.Howlett@Oracle.com>
Tue, 6 Sep 2022 19:48:58 +0000 (19:48 +0000)
committerAndrew Morton <akpm@linux-foundation.org>
Tue, 27 Sep 2022 02:46:21 +0000 (19:46 -0700)
commit01293a62bae2fa55c09cebf5a771eab7219171c3
tree7f9cb1d76cddf952edf4ccec862bed32fb69f56d
parent69dbe6daf1041e32e003f966d71f70f20c63af53
ipc/shm: use VMA iterator instead of linked list

The VMA iterator is faster than the linked llist, and it can be walked
even when VMAs are being removed from the address space, so there's no
need to keep track of 'next'.

Link: https://lkml.kernel.org/r/20220906194824.2110408-46-Liam.Howlett@oracle.com
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
ipc/shm.c