git: 010f09a7b16c - stable/14 - amd64 pmap_allocpte_nosleep(): stop testing tautological condition
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Date: Sun, 21 Jul 2024 08:51:17 UTC
The branch stable/14 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=010f09a7b16c2799d23161ba819a67f309318ef6 commit 010f09a7b16c2799d23161ba819a67f309318ef6 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2024-07-13 04:07:18 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2024-07-21 08:50:29 +0000 amd64 pmap_allocpte_nosleep(): stop testing tautological condition (cherry picked from commit 10a6ae0ddffb1de842a0ba6a6ca29786de6d3bfd) --- sys/amd64/amd64/pmap.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index 50a52d89db85..0d364dec7c82 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -4704,8 +4704,8 @@ pmap_allocpte_nosleep(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp, *pml5 = VM_PAGE_TO_PHYS(m) | PG_U | PG_RW | PG_V | PG_A | PG_M; if (pmap->pm_pmltopu != NULL && pml5index < NUPML5E) { - if (pmap->pm_ucr3 != PMAP_NO_CR3) - *pml5 |= pg_nx; + MPASS(pmap->pm_ucr3 != PMAP_NO_CR3); + *pml5 |= pg_nx; pml5u = &pmap->pm_pmltopu[pml5index]; *pml5u = VM_PAGE_TO_PHYS(m) | PG_U | PG_RW | PG_V | @@ -4725,6 +4725,8 @@ pmap_allocpte_nosleep(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp, if (!pmap_is_la57(pmap) && pmap->pm_pmltopu != NULL && pml4index < NUPML4E) { + MPASS(pmap->pm_ucr3 != PMAP_NO_CR3); + /* * PTI: Make all user-space mappings in the * kernel-mode page table no-execute so that @@ -4732,8 +4734,7 @@ pmap_allocpte_nosleep(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp, * the kernel-mode page table active on return * to user space. */ - if (pmap->pm_ucr3 != PMAP_NO_CR3) - *pml4 |= pg_nx; + *pml4 |= pg_nx; pml4u = &pmap->pm_pmltopu[pml4index]; *pml4u = VM_PAGE_TO_PHYS(m) | PG_U | PG_RW | PG_V |