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[PATCH] x86/mm: Set __vmalloc_start_set in numa_32.c

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__vmalloc_start_set currently only gets set in initmem_init when
!CONFIG_NEED_MULTIPLE_NODES. This currently breaks detection of vmalloc
address with virt_addr_valid with CONFIG_NEED_MULTIPLE_NODES=y.
Set __vmalloc_start_set appropriately for that case as well.

Fixes: dc16ecf7fd1f ("x86-32: use specific __vmalloc_start_set flag in __virt_addr_valid")q
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
 arch/x86/mm/numa_32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 6b7ce62..aca6295 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -100,5 +100,6 @@ void __init initmem_init(void)
 	printk(KERN_DEBUG "High memory starts at vaddr %08lx\n",
 			(ulong) pfn_to_kaddr(highstart_pfn));
 
+	__vmalloc_start_set = true;
 	setup_bootmem_allocator();
 }
-- 
2.7.4

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Re: [mm/usercopy] 517e1fbeb6: kernel BUG at arch/x86/mm/physaddr.c:78! Kees Cook <keescook@chromium.org> - 2017-05-08 00:10 +0200
  Re: [mm/usercopy] 517e1fbeb6: kernel BUG at  arch/x86/mm/physaddr.c:78! Laura Abbott <labbott@redhat.com> - 2017-05-08 20:50 +0200
    Re: [mm/usercopy] 517e1fbeb6: kernel BUG at arch/x86/mm/physaddr.c:78! Kees Cook <keescook@chromium.org> - 2017-05-08 21:20 +0200
      [PATCH] x86/mm: Set __vmalloc_start_set in numa_32.c Laura Abbott <labbott@redhat.com> - 2017-05-08 23:30 +0200
        Re: [PATCH] x86/mm: Set __vmalloc_start_set in numa_32.c Kees Cook <keescook@chromium.org> - 2017-05-09 00:30 +0200
        [tip:x86/urgent] x86/mm/32: Set the '__vmalloc_start_set' flag in  initmem_init() tip-bot for Laura Abbott <tipbot@zytor.com> - 2017-05-09 08:50 +0200

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