Soon vmemmap_alloc_block() will no longer zero the block, so zero memory at its call sites for everything except struct pages. Struct page memory is zero'd by struct page initialization. Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> Reviewed-by: Steven Sistare <steven.sistare@xxxxxxxxxx> Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> Reviewed-by: Bob Picco <bob.picco@xxxxxxxxxx> --- mm/sparse-vmemmap.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index c50b1a14d55e..d40c721ab19f 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -191,6 +191,7 @@ pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node) void *p = vmemmap_alloc_block(PAGE_SIZE, node); if (!p) return NULL; + memset(p, 0, PAGE_SIZE); pmd_populate_kernel(&init_mm, pmd, p); } return pmd; @@ -203,6 +204,7 @@ pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node) void *p = vmemmap_alloc_block(PAGE_SIZE, node); if (!p) return NULL; + memset(p, 0, PAGE_SIZE); pud_populate(&init_mm, pud, p); } return pud; @@ -215,6 +217,7 @@ p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node) void *p = vmemmap_alloc_block(PAGE_SIZE, node); if (!p) return NULL; + memset(p, 0, PAGE_SIZE); p4d_populate(&init_mm, p4d, p); } return p4d; @@ -227,6 +230,7 @@ pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node) void *p = vmemmap_alloc_block(PAGE_SIZE, node); if (!p) return NULL; + memset(p, 0, PAGE_SIZE); pgd_populate(&init_mm, pgd, p); } return pgd; -- 2.13.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
