diff options
| author | Michel Lespinasse <walken@google.com> | 2013-02-21 15:10:28 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2013-02-22 13:46:59 -0800 |
| commit | f53f232504253a5e9f8f19ac1aa1b9161d7e6d2a (patch) | |
| tree | b15d7f891d7b4a68006feda62b63309e4f3177de /arch/ia64 | |
| parent | 19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff) | |
mm: use vm_unmapped_area() on ia64 architecture
Update the ia64 arch_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.
Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/kernel/sys_ia64.c | 37 |
1 files changed, 12 insertions, 25 deletions
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c index d9439ef2f66..41e33f84c18 100644 --- a/arch/ia64/kernel/sys_ia64.c +++ b/arch/ia64/kernel/sys_ia64.c @@ -25,9 +25,9 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len unsigned long pgoff, unsigned long flags) { long map_shared = (flags & MAP_SHARED); - unsigned long start_addr, align_mask = PAGE_SIZE - 1; + unsigned long align_mask = 0; struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; + struct vm_unmapped_area_info info; if (len > RGN_MAP_LIMIT) return -ENOMEM; @@ -44,7 +44,7 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len addr = 0; #endif if (!addr) - addr = mm->free_area_cache; + addr = TASK_UNMAPPED_BASE; if (map_shared && (TASK_SIZE > 0xfffffffful)) /* @@ -53,28 +53,15 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len * tasks, we prefer to avoid exhausting the address space too quickly by * limiting alignment to a single page. */ - align_mask = SHMLBA - 1; - - full_search: - start_addr = addr = (addr + align_mask) & ~align_mask; - - for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { - /* At this point: (!vma || addr < vma->vm_end). */ - if (TASK_SIZE - len < addr || RGN_MAP_LIMIT - len < REGION_OFFSET(addr)) { - if (start_addr != TASK_UNMAPPED_BASE) { - /* Start a new search --- just in case we missed some holes. */ - addr = TASK_UNMAPPED_BASE; - goto full_search; - } - return -ENOMEM; - } - if (!vma || addr + len <= vma->vm_start) { - /* Remember the address where we stopped this search: */ - mm->free_area_cache = addr + len; - return addr; - } - addr = (vma->vm_end + align_mask) & ~align_mask; - } + align_mask = PAGE_MASK & (SHMLBA - 1); + + info.flags = 0; + info.length = len; + info.low_limit = addr; + info.high_limit = TASK_SIZE; + info.align_mask = align_mask; + info.align_offset = 0; + return vm_unmapped_area(&info); } asmlinkage long |