diff options
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/Kconfig | 2 | ||||
| -rw-r--r-- | arch/xtensa/include/uapi/asm/mman.h | 2 | ||||
| -rw-r--r-- | arch/xtensa/kernel/syscall.c | 18 |
3 files changed, 15 insertions, 7 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 12ac277282ba..bcb0c5d2abc2 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -771,7 +771,7 @@ config HIGHMEM If unsure, say Y. -config FORCE_MAX_ZONEORDER +config ARCH_FORCE_MAX_ORDER int "Maximum zone order" default "11" help diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h index 7966a58af472..1ff0c858544f 100644 --- a/arch/xtensa/include/uapi/asm/mman.h +++ b/arch/xtensa/include/uapi/asm/mman.h @@ -111,6 +111,8 @@ #define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ +#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index 201356faa7e6..b3c2450d6f23 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -58,6 +58,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct vm_area_struct *vmm; + struct vma_iterator vmi; if (flags & MAP_FIXED) { /* We do not accept a shared mapping if it would violate @@ -79,15 +80,20 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, else addr = PAGE_ALIGN(addr); - for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { - /* At this point: (!vmm || addr < vmm->vm_end). */ - if (TASK_SIZE - len < addr) - return -ENOMEM; - if (!vmm || addr + len <= vm_start_gap(vmm)) - return addr; + vma_iter_init(&vmi, current->mm, addr); + for_each_vma(vmi, vmm) { + /* At this point: (addr < vmm->vm_end). */ + if (addr + len <= vm_start_gap(vmm)) + break; + addr = vmm->vm_end; if (flags & MAP_SHARED) addr = COLOUR_ALIGN(addr, pgoff); } + + if (TASK_SIZE - len < addr) + return -ENOMEM; + + return addr; } #endif |