diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2013-09-18 14:38:01 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-11-06 06:11:39 +0100 |
| commit | 07ba69a46c3394fe6675483275337e5a79a959e0 (patch) | |
| tree | c5c75c669193afb6ac315a5588f8b6666318ae1f /arch/arc | |
| parent | ARC: Change calling convention of do_page_fault() (diff) | |
| download | linux-07ba69a46c3394fe6675483275337e5a79a959e0.tar.xz linux-07ba69a46c3394fe6675483275337e5a79a959e0.zip | |
ARC: Reduce #ifdef'ery for unaligned access emulation
Emulation not enabled is treated as if the fixup failed, so no need for
special #ifdef checks.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/unaligned.h | 3 | ||||
| -rw-r--r-- | arch/arc/kernel/entry.S | 4 | ||||
| -rw-r--r-- | arch/arc/kernel/traps.c | 3 |
3 files changed, 3 insertions, 7 deletions
diff --git a/arch/arc/include/asm/unaligned.h b/arch/arc/include/asm/unaligned.h index 60702f3751d2..3e5f071bc00c 100644 --- a/arch/arc/include/asm/unaligned.h +++ b/arch/arc/include/asm/unaligned.h @@ -22,7 +22,8 @@ static inline int misaligned_fixup(unsigned long address, struct pt_regs *regs, struct callee_regs *cregs) { - return 0; + /* Not fixed */ + return 1; } #endif diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index eb3f3c5a700a..daa0e7990270 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -366,7 +366,6 @@ ARC_ENTRY EV_TLBProtV ;========== (6b) Non aligned access ============ 4: -#ifdef CONFIG_ARC_MISALIGN_ACCESS SAVE_CALLEE_SAVED_USER mov r2, sp ; callee_regs @@ -375,9 +374,6 @@ ARC_ENTRY EV_TLBProtV ; TBD: optimize - do this only if a callee reg was involved ; either a dst of emulated LD/ST or src with address-writeback RESTORE_CALLEE_SAVED_USER -#else - bl do_misaligned_error -#endif b ret_from_exception diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c index e21692d2fdab..3eadfdabc322 100644 --- a/arch/arc/kernel/traps.c +++ b/arch/arc/kernel/traps.c @@ -84,19 +84,18 @@ DO_ERROR_INFO(SIGBUS, "Invalid Mem Access", do_memory_error, BUS_ADRERR) DO_ERROR_INFO(SIGTRAP, "Breakpoint Set", trap_is_brkpt, TRAP_BRKPT) DO_ERROR_INFO(SIGBUS, "Misaligned Access", do_misaligned_error, BUS_ADRALN) -#ifdef CONFIG_ARC_MISALIGN_ACCESS /* * Entry Point for Misaligned Data access Exception, for emulating in software */ int do_misaligned_access(unsigned long address, struct pt_regs *regs, struct callee_regs *cregs) { + /* If emulation not enabled, or failed, kill the task */ if (misaligned_fixup(address, regs, cregs) != 0) return do_misaligned_error(address, regs); return 0; } -#endif /* * Entry point for miscll errors such as Nested Exceptions |