diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2020-01-14 17:54:04 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-01-27 22:37:45 +1100 |
| commit | 21613cfad181c882b1effd227dcfbddc61dc80f7 (patch) | |
| tree | 8026060f9e7643e9317c0392d54b5cab0889a65d /arch | |
| parent | 509cd3f2b473330238c768bb21a4f2cdc80393fa (diff) | |
powerpc/32: Reuse orphaned memblocks in kasan_init_shadow_page_tables()
If concurrent PMD population has happened, re-use orphaned memblocks.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b29ffffb9206dc14541fa420c17604240728041b.1579024426.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/kasan/kasan_init_32.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c index c4bf9ed04f88..d3cacd462560 100644 --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -34,17 +34,17 @@ static int __init kasan_init_shadow_page_tables(unsigned long k_start, unsigned { pmd_t *pmd; unsigned long k_cur, k_next; + pte_t *new = NULL; pmd = pmd_offset(pud_offset(pgd_offset_k(k_start), k_start), k_start); for (k_cur = k_start; k_cur != k_end; k_cur = k_next, pmd++) { - pte_t *new; - k_next = pgd_addr_end(k_cur, k_end); if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte) continue; - new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE); + if (!new) + new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE); if (!new) return -ENOMEM; |