Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King: "Small set of fixes again." * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: 7419/1: vfp: fix VFP flushing regression on sigreturn path ARM: 7418/1: LPAE: fix access flag setup in mem_type_table ARM: prevent VM_GROWSDOWN mmaps extending below FIRST_USER_ADDRESS ARM: 7417/1: vfp: ensure preemption is disabled when enabling VFP access
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commit
42ea7d7f2a
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@ -247,7 +247,9 @@ good_area:
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return handle_mm_fault(mm, vma, addr & PAGE_MASK, flags);
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check_stack:
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if (vma->vm_flags & VM_GROWSDOWN && !expand_stack(vma, addr))
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/* Don't allow expansion below FIRST_USER_ADDRESS */
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if (vma->vm_flags & VM_GROWSDOWN &&
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addr >= FIRST_USER_ADDRESS && !expand_stack(vma, addr))
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goto good_area;
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out:
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return fault;
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@ -489,7 +489,8 @@ static void __init build_mem_type_table(void)
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*/
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for (i = 0; i < ARRAY_SIZE(mem_types); i++) {
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mem_types[i].prot_pte |= PTE_EXT_AF;
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mem_types[i].prot_sect |= PMD_SECT_AF;
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if (mem_types[i].prot_sect)
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mem_types[i].prot_sect |= PMD_SECT_AF;
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}
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kern_pgprot |= PTE_EXT_AF;
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vecs_pgprot |= PTE_EXT_AF;
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@ -11,6 +11,7 @@
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#include <linux/types.h>
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#include <linux/cpu.h>
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#include <linux/cpu_pm.h>
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#include <linux/hardirq.h>
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/signal.h>
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@ -432,7 +433,10 @@ void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs)
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static void vfp_enable(void *unused)
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{
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u32 access = get_copro_access();
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u32 access;
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BUG_ON(preemptible());
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access = get_copro_access();
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/*
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* Enable full access to VFP (cp10 and cp11)
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@ -573,12 +577,6 @@ int vfp_preserve_user_clear_hwstate(struct user_vfp __user *ufp,
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* entry.
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*/
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hwstate->fpscr &= ~(FPSCR_LENGTH_MASK | FPSCR_STRIDE_MASK);
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/*
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* Disable VFP in the hwstate so that we can detect if it gets
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* used.
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*/
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hwstate->fpexc &= ~FPEXC_EN;
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return 0;
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}
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@ -591,12 +589,8 @@ int vfp_restore_user_hwstate(struct user_vfp __user *ufp,
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unsigned long fpexc;
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int err = 0;
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/*
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* If VFP has been used, then disable it to avoid corrupting
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* the new thread state.
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*/
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if (hwstate->fpexc & FPEXC_EN)
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vfp_flush_hwstate(thread);
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/* Disable VFP to avoid corrupting the new thread state. */
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vfp_flush_hwstate(thread);
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/*
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* Copy the floating point registers. There can be unused
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@ -657,7 +651,7 @@ static int __init vfp_init(void)
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unsigned int cpu_arch = cpu_architecture();
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if (cpu_arch >= CPU_ARCH_ARMv6)
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vfp_enable(NULL);
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on_each_cpu(vfp_enable, NULL, 1);
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/*
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* First check that there is a VFP that we can use.
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@ -678,8 +672,6 @@ static int __init vfp_init(void)
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} else {
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hotcpu_notifier(vfp_hotplug, 0);
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smp_call_function(vfp_enable, NULL, 1);
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VFP_arch = (vfpsid & FPSID_ARCH_MASK) >> FPSID_ARCH_BIT; /* Extract the architecture version */
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printk("implementor %02x architecture %d part %02x variant %x rev %x\n",
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(vfpsid & FPSID_IMPLEMENTER_MASK) >> FPSID_IMPLEMENTER_BIT,
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