44x/bamboo_defconfig
For the mfmsr, that's because mfmsr is defined as 'asm volatile'. Is that correct ? Reading MSR
doesn't have any side effects as far as I know, should we remove the volatile ?
For the wrteei, that's because we are calling __hard_EE_RI_disable() after local_irq_save(). On
booke those two fonctions do exactly the same because RI doesn't exist. Could we replace that by a
__hard_RI_disable() that would be a nop on booke ?
00000364 <interrupt_exit_kernel_prepare>:
364: 81 23 00 84 lwz r9,132(r3)
368: 55 29 04 62 rlwinm r9,r9,0,17,17
36c: 0f 09 00 00 twnei r9,0
370: 81 22 00 4c lwz r9,76(r2)
374: 75 23 00 01 andis. r3,r9,1
378: 40 82 00 14 bne 38c <interrupt_exit_kernel_prepare+0x28>
37c: 7d 20 00 a6 mfmsr r9
380: 7c 00 01 46 wrteei 0
384: 7c 00 01 46 wrteei 0
388: 4e 80 00 20 blr
38c: 38 e2 00 4c addi r7,r2,76
390: 3d 20 00 01 lis r9,1
394: 7c c0 38 28 lwarx r6,0,r7
398: 7c c6 48 78 andc r6,r6,r9
39c: 7c c0 39 2d stwcx. r6,0,r7
3a0: 40 a2 ff f4 bne 394 <interrupt_exit_kernel_prepare+0x30>
3a4: 38 60 00 01 li r3,1
3a8: 4b ff ff d4 b 37c <interrupt_exit_kernel_prepare+0x18>
