Commit fa87b91c authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds

include/linux/mm.h: fix typo in VM_MPX definition

There's a typo in recent change of VM_MPX definition.  We want it to be
VM_HIGH_ARCH_4, not VM_HIGH_ARCH_BIT_4.

This bug does cause visible regressions.  In arch_vma_name the vmflags
are tested against VM_MPX.  With the incorrect value of VM_MPX, a number
of vmas (such as the stack) test positive and end up being marked as
"[mpx]" in /proc/N/maps instead of their correct names.

This confuses tools like rr which expect to be able to find familiar
vmas.

Fixes: df3735c5 ("x86,mpx: make mpx depend on x86-64 to free up VMA flag")
Link: http://lkml.kernel.org/r/20170918140253.36856-1-kirill.shutemov@linux.intel.comSigned-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: default avatarRik van Riel <riel@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kyle Huey <me@kylehuey.com>
Cc: <stable@vger.kernel.org>	[4.14+]
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e00e5a26
......@@ -240,7 +240,7 @@ extern unsigned int kobjsize(const void *objp);
#if defined(CONFIG_X86_INTEL_MPX)
/* MPX specific bounds table or bounds directory */
# define VM_MPX VM_HIGH_ARCH_BIT_4
# define VM_MPX VM_HIGH_ARCH_4
#else
# define VM_MPX VM_NONE
#endif
......
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