renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-29 15:43:59 +08:00
Code

powerpc/mm/hugetlb: Fix kernel crash if we fail to allocate page table caches

Browse Source 
We only check for hugetlb allocations, because with hugetlb we do conditional
registration. For PGD/PUD/PMD levels we register them always in
pgtable_cache_init.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2019-05-28 11:06:25 +05:30 committed by Michael Ellerman
parent 2230ebf6e6
commit 5d49275a27
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/powerpc/mm/hugetlbpage.c
View File

@ -61,12 +61,17 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
num_hugepd = 1;
}
if (!cachep) {
WARN_ONCE(1, "No page table cache created for hugetlb tables");
return -ENOMEM;
}
new = kmem_cache_alloc(cachep, pgtable_gfp_flags(mm, GFP_KERNEL));
BUG_ON(pshift > HUGEPD_SHIFT_MASK);
BUG_ON((unsigned long)new & HUGEPD_SHIFT_MASK);
if (! new)
if (!new)
return -ENOMEM;
/*