Mika Penttilä 57adec866c arm64: mm: avoid calling apply_to_page_range on empty range ... Calling apply_to_page_range with an empty range results in a BUG_ON from the core code. This can be triggered by trying to load the st_drv module with CONFIG_DEBUG_SET_MODULE_RONX enabled: kernel BUG at mm/memory.c:1874! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 3 PID: 1764 Comm: insmod Not tainted 4.5.0-rc1+ #2 Hardware name: ARM Juno development board (r0) (DT) task: ffffffc9763b8000 ti: ffffffc975af8000 task.ti: ffffffc975af8000 PC is at apply_to_page_range+0x2cc/0x2d0 LR is at change_memory_common+0x80/0x108 This patch fixes the issue by making change_memory_common (called by the set_memory_* functions) a NOP when numpages == 0, therefore avoiding the erroneous call to apply_to_page_range and bringing us into line with x86 and s390. Cc: <stable@vger.kernel.org> Reviewed-by: Laura Abbott <labbott@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Mika Penttilä <mika.penttila@nextfour.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2016-01-26 15:56:44 +00:00
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boot	ARM: SoC support for Tegra platforms for v4.5	2016-01-22 17:30:52 -08:00
configs	arm64: defconfig: updates for 4.5	2016-01-26 11:24:41 +00:00
crypto	arm64: crypto: reduce priority of core AES cipher	2015-11-18 12:09:08 +00:00
include	arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings	2016-01-25 11:09:06 +00:00
kernel	arm64: kernel: fix architected PMU registers unconditional access	2016-01-25 11:09:06 +00:00
kvm	arm64: KVM: Add support for 16-bit VMID	2015-12-18 10:15:12 +00:00
lib	arm64: add KASAN support	2015-10-12 17:46:36 +01:00
mm	arm64: mm: avoid calling apply_to_page_range on empty range	2016-01-26 15:56:44 +00:00
net	arm64: bpf: add extra pass to handle faulty codegen	2016-01-17 19:15:26 -05:00
xen	xen/arm: introduce HYPERVISOR_platform_op on arm and arm64	2015-12-21 14:40:56 +00:00
Kconfig	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
Kconfig.debug	arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug	2016-01-09 06:30:49 -08:00
Kconfig.platforms	ARM: SoC support for Tegra platforms for v4.5	2016-01-22 17:30:52 -08:00
Makefile	arm64: errata: Add -mpc-relative-literal-loads to build flags	2016-01-26 11:17:23 +00:00