diff options
Diffstat (limited to 'arch/arc/mm')
-rw-r--r-- | arch/arc/mm/fault.c | 13 | ||||
-rw-r--r-- | arch/arc/mm/highmem.c | 4 | ||||
-rw-r--r-- | arch/arc/mm/init.c | 3 |
3 files changed, 15 insertions, 5 deletions
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index a1d723197084..8df1638259f3 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -141,12 +141,17 @@ good_area: */ fault = handle_mm_fault(vma, address, flags); - /* If Pagefault was interrupted by SIGKILL, exit page fault "early" */ if (fatal_signal_pending(current)) { - if ((fault & VM_FAULT_ERROR) && !(fault & VM_FAULT_RETRY)) - up_read(&mm->mmap_sem); - if (user_mode(regs)) + + /* + * if fault retry, mmap_sem already relinquished by core mm + * so OK to return to user mode (with signal handled first) + */ + if (fault & VM_FAULT_RETRY) { + if (!user_mode(regs)) + goto no_context; return; + } } perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c index 48e700151810..11f57e2ced8a 100644 --- a/arch/arc/mm/highmem.c +++ b/arch/arc/mm/highmem.c @@ -124,6 +124,10 @@ static noinline pte_t * __init alloc_kmap_pgtable(unsigned long kvaddr) pmd_k = pmd_offset(pud_k, kvaddr); pte_k = (pte_t *)memblock_alloc_low(PAGE_SIZE, PAGE_SIZE); + if (!pte_k) + panic("%s: Failed to allocate %lu bytes align=0x%lx\n", + __func__, PAGE_SIZE, PAGE_SIZE); + pmd_populate_kernel(&init_mm, pmd_k, pte_k); return pte_k; } diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index 43bf4c3a1290..e1ab2d7f1d64 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -119,7 +119,8 @@ void __init setup_arch_memory(void) */ memblock_add_node(low_mem_start, low_mem_sz, 0); - memblock_reserve(low_mem_start, __pa(_end) - low_mem_start); + memblock_reserve(CONFIG_LINUX_LINK_BASE, + __pa(_end) - CONFIG_LINUX_LINK_BASE); #ifdef CONFIG_BLK_DEV_INITRD if (phys_initrd_size) { |