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From a392b27653e4e75460753522af0f006006b4dc4e Mon Sep 17 00:00:00 2001
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From: Alexander Egorenkov <egorenar@linux.ibm.com>
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Date: Mon, 6 Dec 2021 16:04:19 +0100
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Subject: [PATCH 06/11] memory: Handle struct slab changes on Linux 5.17-rc1
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and later
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Since kernel commit d122019bf061 ("mm: Split slab into its own type"),
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the struct slab is used for both SLAB and SLUB. Therefore, don't depend
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on the non-presence of the struct slab to decide whether SLAB implementation
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should be chosen and use the member variable "cpu_slab" of the struct
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kmem_cache instead, it should be present only in SLUB.
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Without the patch, crash fails to start with the error message:
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crash: invalid structure member offset: kmem_cache_s_num
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FILE: memory.c LINE: 9619 FUNCTION: kmem_cache_init()
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Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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---
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memory.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/memory.c b/memory.c
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index 86c02c132890..5af45fd7d834 100644
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--- a/memory.c
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+++ b/memory.c
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@@ -576,7 +576,8 @@ vm_init(void)
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STRUCT_SIZE_INIT(cpucache_s, "cpucache_s");
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} else if (!VALID_STRUCT(kmem_slab_s) &&
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- !VALID_STRUCT(slab_s) &&
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+ !VALID_STRUCT(slab_s) &&
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+ !MEMBER_EXISTS("kmem_cache", "cpu_slab") &&
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(VALID_STRUCT(slab) || (vt->flags & SLAB_OVERLOAD_PAGE))) {
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vt->flags |= PERCPU_KMALLOC_V2;
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--
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2.20.1
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