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| author | Mike Frysinger <michael.frysinger@analog.com> | 2007-07-12 05:50:43 +0200 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-07-12 05:50:43 +0200 |
| commit | 9401e618c8f70920f34893946239e24d40a3519a (patch) | |
| tree | b2b057cbf5acdd7c5a7b300977099ea297a24c83 /arch/blackfin | |
| parent | Blackfin arch: Fix Warning add some defines in BF54x header file (diff) | |
| download | linux-9401e618c8f70920f34893946239e24d40a3519a.tar.xz linux-9401e618c8f70920f34893946239e24d40a3519a.zip | |
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>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 5 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 37 |
2 files changed, 5 insertions, 37 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 114277bb46f8..3909f5b35536 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -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 */ diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index fa4e6336317d..d61bba98fb54 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -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 */ |