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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:17:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-08 12:17:25 -0700 |
| commit | 09b56d5a418b7ced4ca427c7cf8faf11df72364c (patch) | |
| tree | 88ad1fe20f8fd7df89131cef5c7f8ef96f15406d /arch/arm/mm | |
| parent | fe1b518075d86976db3a93e7e8b640d24d477519 (diff) | |
| parent | 98becb781e3e27d74efe5f3653b948d39f694cfb (diff) | |
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- add support for ftrace-with-registers, which is needed for kgraft and
other ftrace tools
- support for mremap() for the sigpage/vDSO so that checkpoint/restore
can work
- add timestamps to each line of the register dump output
- remove the unused KTHREAD_SIZE from nommu
- align the ARM bitops APIs with the generic API (using unsigned long
pointers rather than void pointers)
- make the configuration of userspace Thumb support an expert option so
that we can default it on, and avoid some hard to debug userspace
crashes
* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8684/1: NOMMU: Remove unused KTHREAD_SIZE definition
ARM: 8683/1: ARM32: Support mremap() for sigpage/vDSO
ARM: 8679/1: bitops: Align prototypes to generic API
ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS
ARM: make configuration of userspace Thumb support an expert option
ARM: 8673/1: Fix __show_regs output timestamps
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/Kconfig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 877a0e3fd17d..60cdfdc151aa 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -679,7 +679,7 @@ config ARCH_DMA_ADDR_T_64BIT bool config ARM_THUMB - bool "Support Thumb user binaries" if !CPU_THUMBONLY + bool "Support Thumb user binaries" if !CPU_THUMBONLY && EXPERT depends on CPU_THUMB_CAPABLE default y help @@ -690,6 +690,10 @@ config ARM_THUMB instruction set resulting in smaller binaries at the expense of slightly less efficient code. + If this option is disabled, and you run userspace that switches to + Thumb mode, signal handling will not work correctly, resulting in + segmentation faults or illegal instruction aborts. + If you don't know what this all is, saying Y is a safe choice. config ARM_THUMBEE |