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| author | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 17:07:07 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 17:07:07 +0900 |
| commit | 2991be725260d6fec11691a6138b9d71de949956 (patch) | |
| tree | 407241b126eed902bacba4e02043930c6ce087b4 /include/asm-sh/thread_info.h | |
| parent | 0f08f338083cc1d68788ccbccc44bd0502fc57ae (diff) | |
| download | blackbird-op-linux-2991be725260d6fec11691a6138b9d71de949956.tar.gz blackbird-op-linux-2991be725260d6fec11691a6138b9d71de949956.zip | |
sh: Fixup __strnlen_user() behaviour.
Drop TIF_USERSPACE and add addr_limit to the thread_info struct.
Subsequently, use that for address checking in strnlen_user() to
ward off bogus -EFAULTs.
Make __strnlen_user() return 0 on exception, rather than -EFAULT.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/thread_info.h')
| -rw-r--r-- | include/asm-sh/thread_info.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h index f64dd803a014..b986a1914472 100644 --- a/include/asm-sh/thread_info.h +++ b/include/asm-sh/thread_info.h @@ -21,6 +21,7 @@ struct thread_info { unsigned long flags; /* low level flags */ __u32 cpu; int preempt_count; /* 0 => preemptable, <0 => BUG */ + mm_segment_t addr_limit; /* thread address space */ struct restart_block restart_block; __u8 supervisor_stack[0]; }; @@ -40,6 +41,7 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = 1, \ + .addr_limit = KERNEL_DS, \ .restart_block = { \ .fn = do_no_restart_syscall, \ }, \ @@ -95,7 +97,6 @@ static inline struct thread_info *current_thread_info(void) #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 18 -#define TIF_USERSPACE 31 /* true if FS sets userspace */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) @@ -103,7 +104,6 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_USEDFPU (1<<TIF_USEDFPU) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) -#define _TIF_USERSPACE (1<<TIF_USERSPACE) #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */ #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */ |
