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mm/demotion: fix NULL vs IS_ERR checking in memory_tier_init 

alloc_memory_type() returns error pointers on error instead of NULL.  Use
IS_ERR() to check the return value to fix this.

Link: https://lkml.kernel.org/r/20221110030751.1627266-1-linmq006@gmail.com
Fixes: 7b88bda376 ("mm/demotion/dax/kmem: set node's abstract distance to MEMTIER_DEFAULT_DAX_ADISTANCE")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Wei Xu <weixugc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaoqian Lin 2022-11-10 07:07:51 +04:00 committed by Andrew Morton
parent eaec4e639f
commit 4a625ceee8
1 changed files with 1 additions and 1 deletions
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mm/memory-tiers.c
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@ -645,7 +645,7 @@ static int __init memory_tier_init(void)
* than default DRAM tier. * than default DRAM tier.
*/ */
default_dram_type = alloc_memory_type(MEMTIER_ADISTANCE_DRAM); default_dram_type = alloc_memory_type(MEMTIER_ADISTANCE_DRAM);
if (!default_dram_type) if (IS_ERR(default_dram_type))
panic("%s() failed to allocate default DRAM tier\n", __func__); panic("%s() failed to allocate default DRAM tier\n", __func__);
/* /*