linux.git/arch/mips, branch v5.4-rc2

MIPS: fw/arc: Remove unused addr variable

2019-10-04T18:46:22+00:00

The addr variable in prom_free_prom_memory() has been unused since
commit 0df1007677d5 ("MIPS: fw: Record prom memory"), leading to a
compiler warning:

  arch/mips/fw/arc/memory.c:163:16:
    warning: unused variable 'addr' [-Wunused-variable]

Fix this by removing the unused variable.

Signed-off-by: Paul Burton 
Fixes: 0df1007677d5 ("MIPS: fw: Record prom memory")
Cc: Jiaxun Yang 
Cc: linux-mips@vger.kernel.org

MIPS: pmcs-msp71xx: Remove unused addr variable

2019-10-03T22:47:17+00:00

The addr variable in prom_free_prom_memory() has been unused since
commit b3c948e2c00f ("MIPS: msp: Record prom memory"), causing a warning
& build failure due to -Werror. Remove the unused variable.

Signed-off-by: Paul Burton 
Fixes: b3c948e2c00f ("MIPS: msp: Record prom memory")
Cc: Jiaxun Yang 
Cc: linux-mips@vger.kernel.org

MIPS: pmcs-msp71xx: Add missing MAX_PROM_MEM definition

2019-10-03T22:47:14+00:00

Commit b3c948e2c00f ("MIPS: msp: Record prom memory") introduced use of
a MAX_PROM_MEM value but didn't define it. A bounds check in
prom_meminit() suggests its value was supposed to be 5, so define it as
such & adjust the bounds check to use the macro rather than a magic
number.

Signed-off-by: Paul Burton 
Fixes: b3c948e2c00f ("MIPS: msp: Record prom memory")
Cc: Jiaxun Yang 
Cc: linux-mips@vger.kernel.org

mips: Loongson: Fix the link time qualifier of 'serial_exit()'

2019-10-02T21:16:32+00:00

'exit' functions should be marked as __exit, not __init.

Fixes: 85cc028817ef ("mips: make loongsoon serial driver explicitly modular")
Signed-off-by: Christophe JAILLET 
Signed-off-by: Paul Burton 
Cc: chenhc@lemote.com
Cc: ralf@linux-mips.org
Cc: jhogan@kernel.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org

MIPS: init: Prevent adding memory before PHYS_OFFSET

2019-10-02T21:11:30+00:00

On some SGI machines (IP28 and IP30) a small region of memory is mirrored
to pyhsical address 0 for exception vectors while rest of the memory
is reachable at a higher physical address. ARC PROM marks this
region as reserved, but with commit a94e4f24ec83 ("MIPS: init: Drop
boot_mem_map") this chunk is used, when searching for start of ram,
which breaks at least IP28 and IP30 machines. To fix this
add_region_memory() checks for start address < PHYS_OFFSET and ignores
these chunks.

Fixes: a94e4f24ec83 ("MIPS: init: Drop boot_mem_map")
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Paul Burton 
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

MIPS: init: Fix reservation of memory between PHYS_OFFSET and mem start

2019-10-02T21:10:16+00:00

Fix calculation of the size for reserving memory between PHYS_OFFSET
and real memory start.

Fixes: a94e4f24ec83 ("MIPS: init: Drop boot_mem_map")
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Paul Burton 
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

MIPS: VDSO: Fix build for binutils < 2.25

2019-10-02T21:07:32+00:00

Versions of binutils prior to 2.25 are unable to link our VDSO due to an
unsupported R_MIPS_PC32 relocation generated by the ".word _start - ."
line of the inline asm in get_vdso_base(). As such, the intent is that
when building with binutils older than 2.25 we don't build code for
gettimeofday() & friends in the VDSO that rely upon get_vdso_base().

Commit 24640f233b46 ("mips: Add support for generic vDSO") converted us
to using generic VDSO infrastructure, and as part of that the
gettimeofday() functionality moved to a new vgettimeofday.c file. The
check for binutils < 2.25 wasn't updated to handle this new filename,
and so it continues trying to remove the old unused filename from the
build. The end result is that we try to include the gettimeofday() code
in builds that will fail to link.

Fix this by updating the binutils < 2.25 case to remove vgettimeofday.c
from obj-vdso-y, rather than gettimeofday.c.

Signed-off-by: Paul Burton 
Fixes: 24640f233b46 ("mips: Add support for generic vDSO")
Cc: Vincenzo Frascino 
Cc: linux-mips@vger.kernel.org

MIPS: VDSO: Remove unused gettimeofday.c

2019-10-02T21:07:30+00:00

arch/mips/vdso/gettimeofday.c has been unused since commit 24640f233b46
("mips: Add support for generic vDSO"). Remove the dead code.

Signed-off-by: Paul Burton 
Fixes: 24640f233b46 ("mips: Add support for generic vDSO")
Cc: Vincenzo Frascino 
Cc: linux-mips@vger.kernel.org

MIPS: Wire up clone3 syscall

2019-10-02T21:06:41+00:00

Wire up the new clone3 syscall for MIPS, using save_static_function() to
generate a wrapper that saves registers $s0-$s7 prior to invoking the
generic sys_clone3 function just like we do for plain old clone.

Tested atop 64r6el_defconfig using o32, n32 & n64 builds of the simple
test program from:

  https://lore.kernel.org/lkml/20190716130631.tohj4ub54md25dys@brauner.io/

Signed-off-by: Paul Burton 
Cc: Christian Brauner 
Acked-by: Christian Brauner 
Cc: linux-mips@vger.kernel.org

MIPS: octeon: Include required header; fix octeon ethernet build

2019-10-02T17:08:20+00:00

Commit 171a9bae68c7 ("staging/octeon: Allow test build on !MIPS") moved
the inclusion of a bunch of headers by various files in the Octeon
ethernet driver into a common header, but in doing so it changed the
order in which those headers are included.

Prior to the referenced commit drivers/staging/octeon/ethernet.c
included asm/octeon/cvmx-pip.h before asm/octeon/cvmx-ipd.h, which makes
use of the CVMX_PIP_SFT_RST definition pulled in by the former. After
commit 171a9bae68c7 ("staging/octeon: Allow test build on !MIPS") we
pull in asm/octeon/cvmx-ipd.h first & builds fail with:

  In file included from drivers/staging/octeon/octeon-ethernet.h:27,
                   from drivers/staging/octeon/ethernet.c:22:
  arch/mips/include/asm/octeon/cvmx-ipd.h: In function 'cvmx_ipd_free_ptr':
  arch/mips/include/asm/octeon/cvmx-ipd.h:330:27: error: storage size of
    'pip_sft_rst' isn't known
      union cvmx_pip_sft_rst pip_sft_rst;
                             ^~~~~~~~~~~
  arch/mips/include/asm/octeon/cvmx-ipd.h:331:36: error: 'CVMX_PIP_SFT_RST'
    undeclared (first use in this function); did you mean 'CVMX_CIU_SOFT_RST'?
      pip_sft_rst.u64 = cvmx_read_csr(CVMX_PIP_SFT_RST);
                                      ^~~~~~~~~~~~~~~~
                                      CVMX_CIU_SOFT_RST
  arch/mips/include/asm/octeon/cvmx-ipd.h:331:36: note: each undeclared
    identifier is reported only once for each function it appears in
  arch/mips/include/asm/octeon/cvmx-ipd.h:330:27: warning: unused variable
    'pip_sft_rst' [-Wunused-variable]
      union cvmx_pip_sft_rst pip_sft_rst;
                             ^~~~~~~~~~~
  make[4]: *** [scripts/Makefile.build:266: drivers/staging/octeon/ethernet.o]
    Error 1
  make[3]: *** [scripts/Makefile.build:509: drivers/staging/octeon] Error 2

Fix this by having asm/octeon/cvmx-ipd.h include the
asm/octeon/cvmx-pip-defs.h header that it is reliant upon, rather than
requiring its users to pull in that header before it.

Signed-off-by: Paul Burton 
Fixes: 171a9bae68c7 ("staging/octeon: Allow test build on !MIPS")
Cc: David S. Miller 
Cc: Greg Kroah-Hartman 
Cc: Matthew Wilcox (Oracle) 
Cc: linux-mips@vger.kernel.org
Cc: David S . Miller 
Cc: Matthew Wilcox