From: Jiri Kosina Date: Wed, 24 Apr 2019 07:04:57 +0000 (+0200) Subject: x86/mm: Remove in_nmi() warning from 64-bit implementation of vmalloc_fault() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a65c88e16f32aa9ef2e8caa68ea5c29bd5eb0ff0;p=linux.git x86/mm: Remove in_nmi() warning from 64-bit implementation of vmalloc_fault() In-NMI warnings have been added to vmalloc_fault() via: ebc8827f75 ("x86: Barf when vmalloc and kmemcheck faults happen in NMI") back in the time when our NMI entry code could not cope with nested NMIs. These days, it's perfectly fine to take a fault in NMI context and we don't have to care about the fact that IRET from the fault handler might cause NMI nesting. This warning has already been removed from 32-bit implementation of vmalloc_fault() in: 6863ea0cda8 ("x86/mm: Remove in_nmi() warning from vmalloc_fault()") but the 64-bit version was omitted. Remove the bogus warning also from 64-bit implementation of vmalloc_fault(). Reported-by: Nicolai Stange Signed-off-by: Jiri Kosina Acked-by: Peter Zijlstra (Intel) Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Dave Hansen Cc: Frederic Weisbecker Cc: Joerg Roedel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Fixes: 6863ea0cda8 ("x86/mm: Remove in_nmi() warning from vmalloc_fault()") Link: http://lkml.kernel.org/r/nycvar.YFH.7.76.1904240902280.9803@cbobk.fhfr.pm Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index a0df19b0897df..bd20de9db1a84 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -359,8 +359,6 @@ static noinline int vmalloc_fault(unsigned long address) if (!(address >= VMALLOC_START && address < VMALLOC_END)) return -1; - WARN_ON_ONCE(in_nmi()); - /* * Copy kernel mappings over when needed. This can also * happen within a race in page table update. In the later