From: Will Deacon <will.deacon@xxxxxxx> Subject: arm64: mmu: drop pXd_present() checks from pXd_free_pYd_table() The core code already has a check for pXd_none(), so remove it from the architecture implementation. Link: http://lkml.kernel.org/r/1544120495-17438-3-git-send-email-will.deacon@xxxxxxx Signed-off-by: Will Deacon <will.deacon@xxxxxxx> Cc: Chintan Pandya <cpandya@xxxxxxxxxxxxxx> Cc: Toshi Kani <toshi.kani@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/arch/arm64/mm/mmu.c~arm64-mmu-drop-pxd_present-checks-from-pxd_free_pyd_table +++ a/arch/arm64/mm/mmu.c @@ -1003,10 +1003,8 @@ int pmd_free_pte_page(pmd_t *pmdp, unsig pmd = READ_ONCE(*pmdp); - if (!pmd_present(pmd)) - return 1; if (!pmd_table(pmd)) { - VM_WARN_ON(!pmd_table(pmd)); + VM_WARN_ON(1); return 1; } @@ -1026,10 +1024,8 @@ int pud_free_pmd_page(pud_t *pudp, unsig pud = READ_ONCE(*pudp); - if (!pud_present(pud)) - return 1; if (!pud_table(pud)) { - VM_WARN_ON(!pud_table(pud)); + VM_WARN_ON(1); return 1; } _
