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linux-stable/arch/ia64
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Jessica Clarke bd05220c7b arch/ia64: Restore arch-specific pgd_offset_k implementation 
IA-64 is special and treats pgd_offset_k() differently to pgd_offset(),
using different formulae to calculate the indices into the kernel and user
PGDs.  The index into the user PGDs takes into account the region number,
but the index into the kernel (init_mm) PGD always assumes a predefined
kernel region number. Commit 974b9b2c68 ("mm: consolidate pte_index() and
pte_offset_*() definitions") made IA-64 use a generic pgd_offset_k() which
incorrectly used pgd_index() for kernel page tables.  As a result, the
index into the kernel PGD was going out of bounds and the kernel hung
during early boot.

Allow overrides of pgd_offset_k() and override it on IA-64 with the old
implementation that will correctly index the kernel PGD.

Fixes: 974b9b2c68 ("mm: consolidate pte_index() and pte_offset_*() definitions")
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
2020-08-17 21:50:54 +03:00
..
configs Char/Misc driver patches for 5.7-rc1 2020-04-03 13:22:40 -07:00
hp/common docs: fix references for DMA*.txt files 2020-06-26 10:01:32 -06:00
include arch/ia64: Restore arch-specific pgd_offset_k implementation 2020-08-17 21:50:54 +03:00
kernel all arch: remove system call sys_sysctl 2020-08-14 19:56:56 -07:00
lib fix a braino in ia64 uaccess csum changes 2020-06-03 16:18:09 -04:00
mm mm/ia64: use general page fault accounting 2020-08-12 10:58:03 -07:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
scripts ia64: convert unwcheck.py to python3 2018-03-05 14:35:01 -08:00
uv ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
install.sh
Kconfig dma-mapping: make support for dma ops optional 2020-07-19 09:29:23 +02:00
Kconfig.debug ia64: remove support for machvecs 2019-08-16 14:32:26 -07:00
Makefile kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2020-06-11 20:14:41 +09:00
module.lds License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00