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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 13:43:55 +08:00
linux-next/arch/unicore32/include/asm
Joel Fernandes (Google) 4cf5892495 mm: treewide: remove unused address argument from pte_alloc functions
Patch series "Add support for fast mremap".

This series speeds up the mremap(2) syscall by copying page tables at
the PMD level even for non-THP systems.  There is concern that the extra
'address' argument that mremap passes to pte_alloc may do something
subtle architecture related in the future that may make the scheme not
work.  Also we find that there is no point in passing the 'address' to
pte_alloc since its unused.  This patch therefore removes this argument
tree-wide resulting in a nice negative diff as well.  Also ensuring
along the way that the enabled architectures do not do anything funky
with the 'address' argument that goes unnoticed by the optimization.

Build and boot tested on x86-64.  Build tested on arm64.  The config
enablement patch for arm64 will be posted in the future after more
testing.

The changes were obtained by applying the following Coccinelle script.
(thanks Julia for answering all Coccinelle questions!).
Following fix ups were done manually:
* Removal of address argument from  pte_fragment_alloc
* Removal of pte_alloc_one_fast definitions from m68k and microblaze.

// Options: --include-headers --no-includes
// Note: I split the 'identifier fn' line, so if you are manually
// running it, please unsplit it so it runs for you.

virtual patch

@pte_alloc_func_def depends on patch exists@
identifier E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
type T2;
@@

 fn(...
- , T2 E2
 )
 { ... }

@pte_alloc_func_proto_noarg depends on patch exists@
type T1, T2, T3, T4;
identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@

(
- T3 fn(T1, T2);
+ T3 fn(T1);
|
- T3 fn(T1, T2, T4);
+ T3 fn(T1, T2);
)

@pte_alloc_func_proto depends on patch exists@
identifier E1, E2, E4;
type T1, T2, T3, T4;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@

(
- T3 fn(T1 E1, T2 E2);
+ T3 fn(T1 E1);
|
- T3 fn(T1 E1, T2 E2, T4 E4);
+ T3 fn(T1 E1, T2 E2);
)

@pte_alloc_func_call depends on patch exists@
expression E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@

 fn(...
-,  E2
 )

@pte_alloc_macro depends on patch exists@
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
identifier a, b, c;
expression e;
position p;
@@

(
- #define fn(a, b, c) e
+ #define fn(a, b) e
|
- #define fn(a, b) e
+ #define fn(a) e
)

Link: http://lkml.kernel.org/r/20181108181201.88826-2-joelaf@google.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-04 13:13:47 -08:00
..
assembler.h unicore32 additional architecture files: low-level lib: misc 2011-03-17 09:19:13 +08:00
barrier.h arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h 2014-01-12 10:37:15 +01:00
bitops.h fls: change parameter to unsigned int 2019-01-04 13:13:46 -08:00
bug.h signal/unicore32: Generate siginfo in ucs32_notify_die 2018-09-27 22:11:28 +02:00
cache.h unicore32 core architecture: mm related: generic codes 2011-03-17 09:19:08 +08:00
cacheflush.h docs: Fix some broken references 2018-06-15 18:10:01 -03:00
checksum.h ipv4: Update parameters for csum_tcpudp_magic to their original types 2016-03-13 23:55:13 -04:00
cmpxchg.h UniCore32-bugfix: fix mismatch return value of __xchg_bad_pointer 2012-11-09 17:30:09 +08:00
cpu-single.h unicore32 core architecture: processor and system headers 2011-03-17 09:19:06 +08:00
cputype.h unicore32 core architecture: processor and system headers 2011-03-17 09:19:06 +08:00
delay.h unicore32 additional architecture files: low-level lib: misc 2011-03-17 09:19:13 +08:00
dma.h unicore32 core architecture: mm related: consistent device DMA handling 2011-03-17 09:19:09 +08:00
elf.h
fpstate.h unicore32 additional architecture files: float point handling 2011-03-17 09:19:11 +08:00
fpu-ucf64.h unicore32 additional architecture files: float point handling 2011-03-17 09:19:11 +08:00
gpio.h unicore32 io: redefine __REG(x) and re-use readl/writel funcs 2011-03-17 09:19:19 +08:00
hwcap.h unicore32 core architecture: processor and system headers 2011-03-17 09:19:06 +08:00
hwdef-copro.h Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] 2012-03-28 18:30:03 +01:00
io.h arch:unicore32:mm: add devmem_is_allowed() to support STRICT_DEVMEM 2014-06-20 08:22:40 +08:00
irq.h unicore32: remove unused lines in arch/unicore32/include/asm/irq.h 2011-03-17 09:19:17 +08:00
irqflags.h unicore32 core architecture: interrupts ang gpio handling 2011-03-17 09:19:10 +08:00
Kbuild unicore32: remove swiotlb support 2018-09-30 16:07:35 -07:00
linkage.h
memblock.h unicore32 core architecture: mm related: generic codes 2011-03-17 09:19:08 +08:00
memory.h linux/const.h: move UL() macro to include/linux/const.h 2018-04-11 10:28:38 -07:00
mmu_context.h arch, mm: Allow arch_dup_mmap() to fail 2017-12-22 20:13:01 +01:00
mmu.h unicore32 core architecture: mm related: fault handling 2011-03-17 09:19:09 +08:00
page.h unicore32 core architecture: mm related: generic codes 2011-03-17 09:19:08 +08:00
pci.h unicore32/PCI: Use generic pci_mmap_resource_range() 2017-04-20 08:47:47 -05:00
pgalloc.h mm: treewide: remove unused address argument from pte_alloc functions 2019-01-04 13:13:47 -08:00
pgtable-hwdef.h unicore32: drop pte_file()-related helpers 2015-02-10 14:30:33 -08:00
pgtable.h arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
processor.h treewide: remove current_text_addr 2018-10-31 08:54:12 -07:00
ptrace.h arch/unicore32/include/asm/ptrace.h: add generic definition for profile_pc() 2014-06-20 08:22:38 +08:00
stacktrace.h unicore32 core architecture: process/thread related codes 2011-03-17 09:19:07 +08:00
string.h
suspend.h PM / Hibernate: Remove arch_prepare_suspend() 2011-05-24 23:35:55 +02:00
switch_to.h Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] 2012-03-28 18:30:03 +01:00
thread_info.h Construct init thread stack in the linker script rather than by union 2018-01-09 23:21:02 +00:00
timex.h unicore32 core architecture: timer and time handling 2011-03-17 09:19:10 +08:00
tlb.h unicore32: rewrite arch-specific tlb.h to use asm-generic version 2011-03-17 09:19:21 +08:00
tlbflush.h unicore32 core architecture: mm related: consistent device DMA handling 2011-03-17 09:19:09 +08:00
traps.h unicore32 core architecture: low level entry and setup codes 2011-03-17 09:19:06 +08:00
uaccess.h unicore32: get rid of zeroing and switch to RAW_COPY_USER 2017-03-28 18:24:04 -04:00