x86/mm: Fix dump pagetables for 4 levels of page tables
authorJuergen Gross <jgross@suse.com>
Wed, 12 Apr 2017 14:36:34 +0000 (16:36 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 12 Apr 2017 22:26:30 +0000 (00:26 +0200)
commit84bbabc3a452e8085cfbd745ff0bff2b89074417
treefff877123fc551c7fd7e8002bda3ea19ad741de8
parent5f2173e056b2a5c215b862f136192744c447844e
x86/mm: Fix dump pagetables for 4 levels of page tables

Commit fdd3d8ce0ea62 ("x86/dump_pagetables: Add support for 5-level
paging") introduced an error for dumping with only 4 levels by setting
PGD_LEVEL_MULT to a wrong value.

This is leading to e.g. addresses printed as "(null)" for ranges:

  x86/mm: Found insecure W+X mapping at address (null)/(null)

Make PGD_LEVEL_MULT a multiple of PTRS_PER_P4D instead of PTRS_PER_PUD

Fixes: fdd3d8ce0ea62 ("x86/dump_pagetables: Add support for 5-level paging")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: http://lkml.kernel.org/r/20170412143634.6846-1-jgross@suse.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/mm/dump_pagetables.c