diff options
Diffstat (limited to 'include/asm-powerpc/processor.h')
| -rw-r--r-- | include/asm-powerpc/processor.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h index fd98ca998b4..cf83f2d7e2a 100644 --- a/include/asm-powerpc/processor.h +++ b/include/asm-powerpc/processor.h @@ -138,6 +138,8 @@ typedef struct { struct thread_struct { unsigned long ksp; /* Kernel stack pointer */ + unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ + #ifdef CONFIG_PPC64 unsigned long ksp_vsid; #endif @@ -182,11 +184,14 @@ struct thread_struct { #define ARCH_MIN_TASKALIGN 16 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) +#define INIT_SP_LIMIT \ + (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack) #ifdef CONFIG_PPC32 #define INIT_THREAD { \ .ksp = INIT_SP, \ + .ksp_limit = INIT_SP_LIMIT, \ .fs = KERNEL_DS, \ .pgdir = swapper_pg_dir, \ .fpexc_mode = MSR_FE0 | MSR_FE1, \ @@ -194,6 +199,7 @@ struct thread_struct { #else #define INIT_THREAD { \ .ksp = INIT_SP, \ + .ksp_limit = INIT_SP_LIMIT, \ .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \ .fs = KERNEL_DS, \ .fpr = {0}, \ |