diff options
Diffstat (limited to 'arch/parisc/include/asm/mman.h')
| -rw-r--r-- | arch/parisc/include/asm/mman.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/mman.h b/arch/parisc/include/asm/mman.h index 47c5a1991d10..663f587dc789 100644 --- a/arch/parisc/include/asm/mman.h +++ b/arch/parisc/include/asm/mman.h @@ -2,6 +2,7 @@ #ifndef __ASM_MMAN_H__ #define __ASM_MMAN_H__ +#include <linux/fs.h> #include <uapi/asm/mman.h> /* PARISC cannot allow mdwe as it needs writable stacks */ @@ -11,4 +12,18 @@ static inline bool arch_memory_deny_write_exec_supported(void) } #define arch_memory_deny_write_exec_supported arch_memory_deny_write_exec_supported +static inline unsigned long arch_calc_vm_flag_bits(struct file *file, unsigned long flags) +{ + /* + * The stack on parisc grows upwards, so if userspace requests memory + * for a stack, mark it with VM_GROWSUP so that the stack expansion in + * the fault handler will work. + */ + if (flags & MAP_STACK) + return VM_GROWSUP; + + return 0; +} +#define arch_calc_vm_flag_bits(file, flags) arch_calc_vm_flag_bits(file, flags) + #endif /* __ASM_MMAN_H__ */ |