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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-29 09:57:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-29 09:57:13 -0800 |
| commit | d5ff835f88c7c346ba748f389bd4ef5eae619ebc (patch) | |
| tree | 8feddb009e4479fbdad95284d72e4aa3c629038f /arch/arm64/kernel/entry.S | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff) | |
| parent | arm64: Move PTE_PROT_NONE higher up (diff) | |
| download | linux-dev-d5ff835f88c7c346ba748f389bd4ef5eae619ebc.tar.xz linux-dev-d5ff835f88c7c346ba748f389bd4ef5eae619ebc.zip | |
Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull ARM64 fixes from Catalin Marinas:
- Remove preempt_count modifications in the arm64 IRQ handling code
since that's already dealt with in generic irq_enter/irq_exit
- PTE_PROT_NONE bit moved higher up to avoid overlapping with the
hardware bits (for PROT_NONE mappings which are pte_present)
- Big-endian fixes for ptrace support
- Asynchronous aborts unmasking while in the kernel
- pgprot_writecombine() change to create Normal NonCacheable memory
rather than Device GRE
* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
arm64: Move PTE_PROT_NONE higher up
arm64: Use Normal NonCacheable memory for writecombine
arm64: debug: make aarch32 bkpt checking endian clean
arm64: ptrace: fix compat registes get/set to be endian clean
arm64: Unmask asynchronous aborts when in kernel mode
arm64: dts: Reserve the memory used for secondary CPU release address
arm64: let the core code deal with preempt_count
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 29 |
1 files changed, 7 insertions, 22 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index e1166145ca29..4d2c6f3f0c41 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -309,15 +309,12 @@ el1_irq: #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_off #endif -#ifdef CONFIG_PREEMPT - get_thread_info tsk - ldr w24, [tsk, #TI_PREEMPT] // get preempt count - add w0, w24, #1 // increment it - str w0, [tsk, #TI_PREEMPT] -#endif + irq_handler + #ifdef CONFIG_PREEMPT - str w24, [tsk, #TI_PREEMPT] // restore preempt count + get_thread_info tsk + ldr w24, [tsk, #TI_PREEMPT] // restore preempt count cbnz w24, 1f // preempt count != 0 ldr x0, [tsk, #TI_FLAGS] // get flags tbz x0, #TIF_NEED_RESCHED, 1f // needs rescheduling? @@ -507,22 +504,10 @@ el0_irq_naked: #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_off #endif - get_thread_info tsk -#ifdef CONFIG_PREEMPT - ldr w24, [tsk, #TI_PREEMPT] // get preempt count - add w23, w24, #1 // increment it - str w23, [tsk, #TI_PREEMPT] -#endif + irq_handler -#ifdef CONFIG_PREEMPT - ldr w0, [tsk, #TI_PREEMPT] - str w24, [tsk, #TI_PREEMPT] - cmp w0, w23 - b.eq 1f - mov x1, #0 - str x1, [x1] // BUG -1: -#endif + get_thread_info tsk + #ifdef CONFIG_TRACE_IRQFLAGS bl trace_hardirqs_on #endif |