linux-toradex.git/arch/powerpc/mm/slice.c, branch v4.2.7

powerpc: Remove some unused functions

2015-01-28T04:00:24+00:00

Remove slice_set_psize() which is not used.

It was added in 3a8247cc2c85 "powerpc: Only demote individual slices
rather than whole process" but was never used.

Remove vsx_assist_exception() which is not used.

It was added in ce48b2100785 "powerpc: Add VSX context save/restore,
ptrace and signal support" but was never used.

Remove generic_mach_cpu_die() which is not used.

Its last caller was removed in 375f561a4131 "powerpc/powernv: Always go
into nap mode when CPU is offline".

Remove mpc7448_hpc2_power_off() and mpc7448_hpc2_halt() which are
unused.

These were introduced in c5d56332fd6c "[POWERPC] Add general support for
mpc7448hpc2 (Taiga) platform" but were never used.

This was partially found by using a static code analysis program called
cppcheck.

Signed-off-by: Rickard Strandqvist 
[mpe: Update changelog with details on when/why they are unused]
Signed-off-by: Michael Ellerman

powerpc/mm: Fix build error with hugetlfs disabled

2014-10-22T03:03:06+00:00

arch/powerpc/mm/slice.c:704:5: error: expected identifier or ‘(’ before numeric constant
 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
     ^
make[1]: *** [arch/powerpc/mm/slice.o] Error 1
make: *** [arch/powerpc/mm/slice.o] Error 2

This got introduced via 1217d34b531c76362217057ca70a8ce8950574e0
"powerpc: Ensure global functions include their prototype". We
started including linux/hugetlb.h with that patch and now we have

 #define is_hugepage_only_range(mm, addr, len)	0

with hugetlbfs disabled.

Fixes: 1217d34b531c ("powerpc: Ensure global functions include their prototype")
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Michael Ellerman

powerpc/cell: Make spu_flush_all_slbs() generic

2014-10-08T09:15:37+00:00

This moves spu_flush_all_slbs() into a generic call copro_flush_all_slbs().

This will be useful when we add cxl which also needs a similar SLB flush call.

Signed-off-by: Ian Munsie 
Signed-off-by: Michael Neuling 
Signed-off-by: Michael Ellerman

powerpc: Ensure global functions include their prototype

2014-09-25T13:14:42+00:00

Fix a number of places where global functions were not including
their prototype. This ensures the prototype and the function match.

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space

2014-01-29T06:02:25+00:00

According to Posix, if MAP_FIXED is specified mmap shall set ENOMEM if
the requested mapping exceeds the allowed range for address space of
the process. The generic code set it right, but the specific powerpc
slice_get_unmapped_area() function currently returns -EINVAL in that
case.
This patch corrects it.

Signed-off-by: Jerome Marchand 
Signed-off-by: Benjamin Herrenschmidt

powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled

2013-11-20T23:33:41+00:00

Commit fba2369e6ceb (mm: use vm_unmapped_area() on powerpc architecture)
has a bug in slice_scan_available() where we compare an unsigned long
(high_slices) against a shifted int. As a result, comparisons against
the top 32 bits of high_slices (representing the top 32TB) always
returns 0 and the top of our mmap region is clamped at 32TB

This also breaks mmap randomisation since the randomised address is
always up near the top of the address space and it gets clamped down
to 32TB.

Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Anton Blanchard 
Acked-by: Michel Lespinasse 
Signed-off-by: Benjamin Herrenschmidt

mm: use vm_unmapped_area() on powerpc architecture

2013-04-30T01:05:17+00:00

Update the powerpc slice_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Tested-by: "Aneesh Kumar K.V" 
Acked-by: David Gibson 
Signed-off-by: Andrew Morton 
Signed-off-by: Benjamin Herrenschmidt

mm: remove free_area_cache use in powerpc architecture

2013-04-30T01:05:10+00:00

As all other architectures have been converted to use vm_unmapped_area(),
we are about to retire the free_area_cache.

This change simply removes the use of that cache in
slice_get_unmapped_area(), which will most certainly have a
performance cost. Next one will convert that function to use the
vm_unmapped_area() infrastructure and regain the performance.

Signed-off-by: Michel Lespinasse 
Acked-by: Rik van Riel 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: "Aneesh Kumar K.V" 
Signed-off-by: Andrew Morton 
Signed-off-by: Benjamin Herrenschmidt

Fix misspellings of "whether" in comments.

2012-11-19T13:31:35+00:00

"Whether" is misspelled in various comments across the tree; this
fixes them. No code changes.

Signed-off-by: Adam Buchbinder 
Signed-off-by: Jiri Kosina

powerpc/mm: Make some of the PGTABLE_RANGE dependency explicit

2012-09-17T06:31:53+00:00

slice array size and slice mask size depend on PGTABLE_RANGE.

Reviewed-by: Paul Mackerras 
Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Benjamin Herrenschmidt