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>
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index fa4e633..d61bba98 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -97,17 +97,6 @@
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 @@
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 @@
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 */