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SubjectRe: simplify procfs code for seq_file instances V2
Date
Note that your kernel hits the:

inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
(ptrval) (fs_reclaim){?.+.}, at: fs_reclaim_acquire+0x12/0x35
{HARDIRQ-ON-W} state was registered at:
fs_reclaim_acquire+0x32/0x35
kmem_cache_alloc_node_trace+0x49/0x2cf
alloc_worker+0x1d/0x49
init_rescuer.part.7+0x19/0x8f
workqueue_init+0xc0/0x1fe
kernel_init_freeable+0xdc/0x433
kernel_init+0xa/0xf5
ret_from_fork+0x24/0x30

bug, as described here:

https://groups.google.com/forum/#!msg/syzkaller-bugs/sJC3Y3hOM08/aO3z9JXoAgAJ

David

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