diff options
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 9519e6bdc6d7..0a0399c2af11 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -59,14 +59,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ #if defined(CONFIG_RELOCATABLE) /* - * We can't branch directly; in the direct case we use LR - * and system_call_entry restores LR. (We thus need to move - * LR to r10 in the RFID case too.) + * We can't branch directly so we do it via the CTR which + * is volatile across system calls. */ #define SYSCALL_PSERIES_2_DIRECT \ mflr r10 ; \ ld r12,PACAKBASE(r13) ; \ - LOAD_HANDLER(r12, system_call_entry_direct) ; \ + LOAD_HANDLER(r12, system_call_entry) ; \ mtctr r12 ; \ mfspr r12,SPRN_SRR1 ; \ /* Re-use of r13... No spare regs to do this */ \ @@ -80,7 +79,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \ mfspr r12,SPRN_SRR1 ; \ li r10,MSR_RI ; \ mtmsrd r10,1 ; /* Set RI (EE=0) */ \ - b system_call_entry_direct ; + b system_call_common ; #endif /* @@ -969,13 +968,6 @@ hv_facility_unavailable_relon_trampoline: __end_interrupts: .align 7 -system_call_entry_direct: -#if defined(CONFIG_RELOCATABLE) - /* The first level prologue may have used LR to get here, saving - * orig in r10. To save hacking/ifdeffing common code, restore here. - */ - mtlr r10 -#endif system_call_entry: b system_call_common |