powerpc/ppc64: Allow allmodconfig to build (finally !)

[Guenter Roeck]

On Tue, May 13, 2014 at 07:16:41PM +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2014-05-12 at 17:28 -0700, Guenter Roeck wrote:
> 
> > After applying this patch, I get
> > 
> > arch/powerpc/kernel/exceptions-64s.S:269: Error: operand out of range
> > (0x000000000000814c is not between 0xffffffffffff8000 and 0x0000000000007ffc)
> > arch/powerpc/kernel/exceptions-64s.S:729: Error: operand out of range
> > (0x000000000000814c is not between 0xffffffffffff8000 and 0x0000000000007ffc)
> > 
> > with powerpc:defconfig, powerpc:allmodconfig, powerpc:cell_defconfig, and
> > powerpc:maple_defconfig.
> > 
> > This is on top of v3.15-rc5. Any idea what is going on ?
> > 
> > Compiler is powerpc64-poky-linux-gcc (GCC) 4.7.2 (from poky 1.4.0-1).
> 
> Interesting... works with all my test configs using 4.7.3...
> 
> I don't have my tree at hand right now, I'll check what that means
> tomorrow see if I can find a workaround.
> 

Drives me crazy. With gcc 4.8.2, powerpc:allmodconfig builds, but now I get
failures with ppc64e_defconfig and chroma_defconfig:

arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
(.text+0x165ee): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol
`interrupt_base_book3e' defined in .text section in
arch/powerpc/kernel/built-in.o
arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
(.text+0x16602): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol
`interrupt_end_book3e' defined in .text section in
arch/powerpc/kernel/built-in.o
arch/powerpc/kernel/built-in.o: In function `exc_debug_debug_book3e':
(.text+0x1679e): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol
`interrupt_base_book3e' defined in .text section in
arch/powerpc/kernel/built-in.o
arch/powerpc/kernel/built-in.o: In function `exc_debug_debug_book3e':
(.text+0x167b2): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol
`interrupt_end_book3e' defined in .text section in
arch/powerpc/kernel/built-in.o
arch/powerpc/kernel/built-in.o: In function `skpinv':
arch/powerpc/kernel/exceptions-64e.o:(.text+0x178c6): relocation truncated to
fit: R_PPC64_ADDR16_HI against `.text'+178e0
arch/powerpc/kernel/built-in.o: In function `a2_tlbinit_after_linear_map':
(.text+0x17966): relocation truncated to fit: R_PPC64_ADDR16_HI against
`.text'+17974
arch/powerpc/kernel/built-in.o: In function `.init_core_book3e':
arch/powerpc/kernel/exceptions-64e.o:(.text+0x17a7e): relocation truncated to
fit: R_PPC64_ADDR16_HI against symbol `interrupt_base_book3e' defined in .text
section in arch/powerpc/kernel/built-in.o

Worse, that happens even without your patch applied, and the patch does not
make a difference :-(.

Guenter