objtool warning for wanxl_pci_init_one with gcc-7

From: Arnd Bergmann
Date: Wed Jan 04 2017 - 06:19:32 EST


Hi Josh,

I'm getting a new warning with the latest gcc-7 snapshot, I think this
is a false positive:

drivers/net/wan/wanxl.o: warning: objtool: wanxl_pci_init_one()+0x9d2: sibling call from callable instruction with changed frame pointer

# /git/arm-soc/drivers/net/wan/wanxl.c:133: switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
movl %eax, %ecx # value, _314
movl %eax, %r10d # value, _224
movq (%r15), %rdi # MEM[base: _546, offset: 0B], pretmp_490
shrl $5, %ecx #, _314
andl $8, %r10d #, _224
movl %ecx, %edx # _314, tmp377
andl $7, %edx #, tmp377
jmp *(%r14,%rdx,8) #
.section .rodata
.align 8
.align 4
.L280:
.quad .L278
.quad .L278
.quad .L279
.quad .L281
.quad .L282
.quad .L305
.quad .L278
.quad .L306
.text

Arnd