diff options
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 12 | ||||
| -rw-r--r-- | arch/s390/include/asm/uaccess.h | 23 |
2 files changed, 21 insertions, 14 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 3c8fae02ac2d..c57c5c2f2484 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -15,13 +15,15 @@ #define CIF_MCCK_PENDING 0 /* machine check handling is pending */ #define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */ -#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */ -#define CIF_FPU 3 /* restore FPU registers */ -#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */ -#define CIF_ENABLED_WAIT 5 /* in enabled wait state */ +#define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */ +#define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */ +#define CIF_FPU 4 /* restore FPU registers */ +#define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */ +#define CIF_ENABLED_WAIT 6 /* in enabled wait state */ #define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING) #define _CIF_ASCE_PRIMARY _BITUL(CIF_ASCE_PRIMARY) +#define _CIF_ASCE_SECONDARY _BITUL(CIF_ASCE_SECONDARY) #define _CIF_NOHZ_DELAY _BITUL(CIF_NOHZ_DELAY) #define _CIF_FPU _BITUL(CIF_FPU) #define _CIF_IGNORE_IRQ _BITUL(CIF_IGNORE_IRQ) @@ -200,10 +202,12 @@ struct stack_frame { struct task_struct; struct mm_struct; struct seq_file; +struct pt_regs; typedef int (*dump_trace_func_t)(void *data, unsigned long address, int reliable); void dump_trace(dump_trace_func_t func, void *data, struct task_struct *task, unsigned long sp); +void show_registers(struct pt_regs *regs); void show_cacheinfo(struct seq_file *m); diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h index b2988fc60f65..136932ff4250 100644 --- a/arch/s390/include/asm/uaccess.h +++ b/arch/s390/include/asm/uaccess.h @@ -14,6 +14,7 @@ */ #include <linux/sched.h> #include <linux/errno.h> +#include <asm/processor.h> #include <asm/ctl_reg.h> #define VERIFY_READ 0 @@ -36,18 +37,20 @@ #define get_ds() (KERNEL_DS) #define get_fs() (current->thread.mm_segment) - -#define set_fs(x) \ -do { \ - unsigned long __pto; \ - current->thread.mm_segment = (x); \ - __pto = current->thread.mm_segment.ar4 ? \ - S390_lowcore.user_asce : S390_lowcore.kernel_asce; \ - __ctl_load(__pto, 7, 7); \ -} while (0) - #define segment_eq(a,b) ((a).ar4 == (b).ar4) +static inline void set_fs(mm_segment_t fs) +{ + current->thread.mm_segment = fs; + if (segment_eq(fs, KERNEL_DS)) { + set_cpu_flag(CIF_ASCE_SECONDARY); + __ctl_load(S390_lowcore.kernel_asce, 7, 7); + } else { + clear_cpu_flag(CIF_ASCE_SECONDARY); + __ctl_load(S390_lowcore.user_asce, 7, 7); + } +} + static inline int __range_ok(unsigned long addr, unsigned long size) { return 1; |