Toshi Kani f967db0b9e x86/mm: Disable ioremap free page handling on x86-PAE ... ioremap() supports pmd mappings on x86-PAE. However, kernel's pmd tables are not shared among processes on x86-PAE. Therefore, any update to sync'd pmd entries need re-syncing. Freeing a pte page also leads to a vmalloc fault and hits the BUG_ON in vmalloc_sync_one(). Disable free page handling on x86-PAE. pud_free_pmd_page() and pmd_free_pte_page() simply return 0 if a given pud/pmd entry is present. This assures that ioremap() does not update sync'd pmd entries at the cost of falling back to pte mappings. Fixes: 28ee90fe60 ("x86/mm: implement free pmd/pte page interfaces") Reported-by: Joerg Roedel <joro@8bytes.org> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: mhocko@suse.com Cc: akpm@linux-foundation.org Cc: hpa@zytor.com Cc: cpandya@codeaurora.org Cc: linux-mm@kvack.org Cc: linux-arm-kernel@lists.infradead.org Cc: stable@vger.kernel.org Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Hocko <mhocko@suse.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <stable@vger.kernel.org> Link: https://lkml.kernel.org/r/20180627141348.21777-2-toshi.kani@hpe.com		2018-07-04 21:37:08 +02:00
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alpha
arc
arm	ARM: SoC fixes for 4.18-rc	2018-06-30 14:08:06 -07:00
arm64	ARM: SoC fixes for 4.18-rc	2018-06-30 14:08:06 -07:00
c6x
h8300
hexagon
ia64
m68k
microblaze	Microblaze patches for 4.18-rc3	2018-06-27 09:49:30 -07:00
mips	MIPS: Add ksig argument to rseq_{signal_deliver,handle_notify_resume}	2018-06-24 10:33:03 -07:00
nds32
nios2
openrisc
parisc	parisc: Build kernel without -ffunction-sections	2018-06-29 17:27:20 +02:00
powerpc	Kbuild fixes for v4.18	2018-06-30 13:05:30 -07:00
riscv
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2018-06-19 07:44:51 +09:00
sh
sparc
um
unicore32
x86	x86/mm: Disable ioremap free page handling on x86-PAE	2018-07-04 21:37:08 +02:00
xtensa
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Kconfig