From c8eebc4a99f15280654f23e914e746c40a516e50 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 16 Jun 2023 16:38:15 +0530 Subject: powerpc/mm/dax: Fix the condition when checking if altmap vmemap can cross-boundary Without this fix, the last subsection vmemmap can end up in memory even if the namespace is created with -M mem and has sufficient space in the altmap area. Fixes: cf387d9644d8 ("libnvdimm/altmap: Track namespace boundaries in altmap") Signed-off-by: Aneesh Kumar K.V Tested-by: Sachin Sant > Signed-off-by: Michael Ellerman Link: https://msgid.link/20230616110826.344417-6-aneesh.kumar@linux.ibm.com --- arch/powerpc/mm/init_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc') diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 05b0d584e50b..fe1b83020e0d 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -189,7 +189,7 @@ static bool altmap_cross_boundary(struct vmem_altmap *altmap, unsigned long star unsigned long nr_pfn = page_size / sizeof(struct page); unsigned long start_pfn = page_to_pfn((struct page *)start); - if ((start_pfn + nr_pfn) > altmap->end_pfn) + if ((start_pfn + nr_pfn - 1) > altmap->end_pfn) return true; if (start_pfn < altmap->base_pfn) -- cgit v1.2.3