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Blackfin arch: scrub dead code 

we converted to using a system call for userspace spinlocks
rather than a dedicated exception long ago

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Mike Frysinger 2007-07-12 11:50:43 +08:00 committed by Bryan Wu
parent c9e27ece79
commit 9401e618c8
2 changed files with 5 additions and 37 deletions
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5
arch/blackfin/kernel/traps.c
View File

@ -193,15 +193,14 @@ asmlinkage void trap_c(struct pt_regs *fp)
#else
/* 0x02 - User Defined, Caught by default */
#endif
/* 0x03 - Atomic test and set */
/* 0x03 - User Defined, userspace stack overflow */
case VEC_EXCPT03:
info.si_code = SEGV_STACKFLOW;
sig = SIGSEGV;
printk(KERN_EMERG EXC_0x03);
CHK_DEBUGGER_TRAP();
break;
/* 0x04 - spinlock - handled by _ex_spinlock,
getting here is an error */
/* 0x04 - User Defined, Caught by default */
/* 0x05 - User Defined, Caught by default */
/* 0x06 - User Defined, Caught by default */
/* 0x07 - User Defined, Caught by default */

37
arch/blackfin/mach-common/entry.S
View File

@ -97,17 +97,6 @@ ENTRY(_ex_icplb)
rtx;
ENDPROC(_ex_icplb)
ENTRY(_ex_spinlock)
/* Transform this into a syscall - twiddle the syscall vector. */
p5.l = lo(EVT15);
p5.h = hi(EVT15);
r7.l = _spinlock_bh;
r7.h = _spinlock_bh;
[p5] = r7;
csync;
/* Fall through. */
ENDPROC(_ex_spinlock)
ENTRY(_ex_syscall)
DEBUG_START_HWTRACE(p5, r7)
(R7:6,P5:4) = [sp++];
@ -117,26 +106,6 @@ ENTRY(_ex_syscall)
rtx
ENDPROC(_ex_syscall)
ENTRY(_spinlock_bh)
SAVE_ALL_SYS
/* To end up here, vector 15 was changed - so we have to change it
* back.
*/
p0.l = lo(EVT15);
p0.h = hi(EVT15);
p1.l = _evt_system_call;
p1.h = _evt_system_call;
[p0] = p1;
csync;
r0 = [sp + PT_R0];
sp += -12;
call _sys_bfin_spinlock;
sp += 12;
[SP + PT_R0] = R0;
RESTORE_ALL_SYS
rti;
ENDPROC(_spinlock_bh)
ENTRY(_ex_soft_bp)
r7 = retx;
r7 += -2;
@ -775,14 +744,14 @@ ENDPROC(_init_exception_buff)
ALIGN
_extable:
/* entry for each EXCAUSE[5:0]
* This table bmust be in sync with the table in ./kernel/traps.c
* This table must be in sync with the table in ./kernel/traps.c
* EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
*/
.long _ex_syscall; /* 0x00 - User Defined - Linux Syscall */
.long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */
.long _ex_trap_c /* 0x02 - User Defined */
.long _ex_trap_c /* 0x03 - User Defined - Atomic test and set service */
.long _ex_spinlock /* 0x04 - User Defined */
.long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
.long _ex_trap_c /* 0x04 - User Defined */
.long _ex_trap_c /* 0x05 - User Defined */
.long _ex_trap_c /* 0x06 - User Defined */
.long _ex_trap_c /* 0x07 - User Defined */