diff options
Diffstat (limited to 'arch/x86_64/kernel/sys_x86_64.c')
| -rw-r--r-- | arch/x86_64/kernel/sys_x86_64.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/x86_64/kernel/sys_x86_64.c b/arch/x86_64/kernel/sys_x86_64.c index dbebd5ccba6b..cc7821c68851 100644 --- a/arch/x86_64/kernel/sys_x86_64.c +++ b/arch/x86_64/kernel/sys_x86_64.c @@ -68,13 +68,7 @@ out: static void find_start_end(unsigned long flags, unsigned long *begin, unsigned long *end) { -#ifdef CONFIG_IA32_EMULATION - if (test_thread_flag(TIF_IA32)) { - *begin = TASK_UNMAPPED_32; - *end = IA32_PAGE_OFFSET; - } else -#endif - if (flags & MAP_32BIT) { + if (!test_thread_flag(TIF_IA32) && (flags & MAP_32BIT)) { /* This is usually used needed to map code in small model, so it needs to be in the first 31bit. Limit it to that. This means we need to move the @@ -84,10 +78,10 @@ static void find_start_end(unsigned long flags, unsigned long *begin, of playground for now. -AK */ *begin = 0x40000000; *end = 0x80000000; - } else { - *begin = TASK_UNMAPPED_64; + } else { + *begin = TASK_UNMAPPED_BASE; *end = TASK_SIZE; - } + } } unsigned long @@ -111,6 +105,11 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, (!vma || addr + len <= vma->vm_start)) return addr; } + if (((flags & MAP_32BIT) || test_thread_flag(TIF_IA32)) + && len <= mm->cached_hole_size) { + mm->cached_hole_size = 0; + mm->free_area_cache = begin; + } addr = mm->free_area_cache; if (addr < begin) addr = begin; @@ -126,6 +125,7 @@ full_search: */ if (start_addr != begin) { start_addr = addr = begin; + mm->cached_hole_size = 0; goto full_search; } return -ENOMEM; @@ -137,6 +137,9 @@ full_search: mm->free_area_cache = addr + len; return addr; } + if (addr + mm->cached_hole_size < vma->vm_start) + mm->cached_hole_size = vma->vm_start - addr; + addr = vma->vm_end; } } |