Section mismatch in reference from the variable via_pmu_driver

[Christian Kujau]

Hi,

while compiling 3.15-rc6 for powerpc (gcc-4.8.1 crosscompiler on x86_64), 
a warning popped up:

   WARNING: modpost: Found 1 section mismatch(es).

Compiling with CONFIG_DEBUG_SECTION_MISMATCH=y gives:

-----------------------------------
  LD      drivers/macintosh/built-in.o
  CC [M]  fs/hfsplus/inode.o
WARNING: drivers/macintosh/built-in.o(.data+0x184): Section mismatch in 
reference from the variable via_pmu_driver to the function 
.init.text:pmu_init()
The variable via_pmu_driver references
the function __init pmu_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the 
variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
-----------------------------------

...and, later on:

-----------------------------------
  LD      drivers/built-in.o
WARNING: drivers/built-in.o(.data+0x488c): Section mismatch in reference 
from the variable via_pmu_driver to the function .init.text:pmu_init()
The variable via_pmu_driver references
the function __init pmu_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the 
variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

  LINK    vmlinux
  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: vmlinux.o(.data+0x1ff44): Section mismatch in reference from the 
variable via_pmu_driver to the function .init.text:pmu_init()
The variable via_pmu_driver references
the function __init pmu_init()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the 
variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
-----------------------------------

This had been reported [0] by Geert for v3.3-rc1 back in 2012, and maybe 
the warning was always there, but I didn't notice it until now.

Oh, and after everything has been built, this happens:

-----------------------------------
INFO: Uncompressed kernel (size 0x6714a0) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x700000)
-----------------------------------

...but I think this was always printed after compiling a kernel for 
PowerPC, I just just I should mention it (again [1]).

Thanks,
Christian.

[0] https://lkml.org/lkml/2012/1/22/17
[1] https://lkml.org/lkml/2012/4/4/140
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