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mm, mempool: do not allow atomic resizing

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Allocating a large number of elements in atomic context could quickly
deplete memory reserves, so just disallow atomic resizing entirely.

Nothing currently uses mempool_resize() with anything other than
GFP_KERNEL, so convert existing callers to drop the gfp_mask.

[[email protected]: coding-style fixes]
Signed-off-by: David Rientjes <[email protected]>
Acked-by: Steffen Maier <[email protected]>	[zfcp]
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Steve French <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Rientjes 2015-04-14 15:48:21 -07:00 • committed by Linus Torvalds
commit 11d8336045
4 changed files with 11 additions and 11 deletions
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4
drivers/s390/scsi/zfcp_erp.c
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@ -738,11 +738,11 @@ static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
return ZFCP_ERP_FAILED;
if (mempool_resize(act->adapter->pool.sr_data,
act->adapter->stat_read_buf_num, GFP_KERNEL))
act->adapter->stat_read_buf_num))
return ZFCP_ERP_FAILED;
if (mempool_resize(act->adapter->pool.status_read_req,
act->adapter->stat_read_buf_num, GFP_KERNEL))
act->adapter->stat_read_buf_num))
return ZFCP_ERP_FAILED;
atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num);