linux-toradex.git/arch/hexagon/mm, branch v6.17

arch, mm: make releasing of memory to page allocator more explicit

2025-03-18T05:06:53+00:00

The point where the memory is released from memblock to the buddy
allocator is hidden inside arch-specific mem_init()s and the call to
memblock_free_all() is needlessly duplicated in every artiste cure and
after introduction of arch_mm_preinit() hook, mem_init() implementation on
many architecture only contains the call to memblock_free_all().

Pull memblock_free_all() call into mm_core_init() and drop mem_init() on
relevant architectures to make it more explicit where the free memory is
released from memblock to the buddy allocator and to reduce code
duplication in architecture specific code.

Link: https://lkml.kernel.org/r/20250313135003.836600-14-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Acked-by: Dave Hansen 	[x86]
Acked-by: Geert Uytterhoeven 	[m68k]
Tested-by: Mark Brown 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

arch, mm: set high_memory in free_area_init()

2025-03-18T05:06:52+00:00

high_memory defines upper bound on the directly mapped memory.  This bound
is defined by the beginning of ZONE_HIGHMEM when a system has high memory
and by the end of memory otherwise.

All this is known to generic memory management initialization code that
can set high_memory while initializing core mm structures.

Add a generic calculation of high_memory to free_area_init() and remove
per-architecture calculation except for the architectures that set and use
high_memory earlier than that.

Link: https://lkml.kernel.org/r/20250313135003.836600-11-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Acked-by: Dave Hansen 	[x86]
Tested-by: Mark Brown 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

hexagon: move initialization of init_mm.context init to paging_init()

2025-03-18T05:06:51+00:00

This will help with pulling out memblock_free_all() to the generic
code and reducing code duplication in arch::mem_init().

Link: https://lkml.kernel.org/r/20250313135003.836600-4-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: Dave Hansen 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Mark Brown 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

hexagon: vm_tlb: include asm/tlbflush.h for prototypes

2023-12-11T01:21:35+00:00

Clang warns about several missing prototypes that are declared in this
header:

  arch/hexagon/mm/vm_tlb.c:25:6: warning: no previous prototype for function 'flush_tlb_range' [-Wmissing-prototypes]
     25 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
        |      ^
  arch/hexagon/mm/vm_tlb.c:25:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     25 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:37:6: warning: no previous prototype for function 'flush_tlb_one' [-Wmissing-prototypes]
     37 | void flush_tlb_one(unsigned long vaddr)
        |      ^
  arch/hexagon/mm/vm_tlb.c:37:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     37 | void flush_tlb_one(unsigned long vaddr)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:47:6: warning: no previous prototype for function 'tlb_flush_all' [-Wmissing-prototypes]
     47 | void tlb_flush_all(void)
        |      ^
  arch/hexagon/mm/vm_tlb.c:47:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     47 | void tlb_flush_all(void)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:56:6: warning: no previous prototype for function 'flush_tlb_mm' [-Wmissing-prototypes]
     56 | void flush_tlb_mm(struct mm_struct *mm)
        |      ^
  arch/hexagon/mm/vm_tlb.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     56 | void flush_tlb_mm(struct mm_struct *mm)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:66:6: warning: no previous prototype for function 'flush_tlb_page' [-Wmissing-prototypes]
     66 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long vaddr)
        |      ^
  arch/hexagon/mm/vm_tlb.c:66:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     66 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long vaddr)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:78:6: warning: no previous prototype for function 'flush_tlb_kernel_range' [-Wmissing-prototypes]
     78 | void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        |      ^
  arch/hexagon/mm/vm_tlb.c:78:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     78 | void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        | ^
        | static
  6 warnings generated.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-7-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vm_fault: include asm/vm_fault.h for prototypes

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/vm_fault.c:157:6: warning: no previous prototype for function 'read_protection_fault' [-Wmissing-prototypes]
    157 | void read_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:157:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    157 | void read_protection_fault(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/mm/vm_fault.c:164:6: warning: no previous prototype for function 'write_protection_fault' [-Wmissing-prototypes]
    164 | void write_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:164:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    164 | void write_protection_fault(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/mm/vm_fault.c:171:6: warning: no previous prototype for function 'execute_protection_fault' [-Wmissing-prototypes]
    171 | void execute_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:171:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    171 | void execute_protection_fault(struct pt_regs *regs)
        | ^
        | static

The prototypes for these functions are defined in asm/vm_fault.h, so
include it to pick them up and silence the warnings.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-6-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vm_fault: mark do_page_fault() as static

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/vm_fault.c:36:6: warning: no previous prototype for function 'do_page_fault' [-Wmissing-prototypes]
     36 | void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:36:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     36 | void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
        | ^
        | static

This function is not used outside of this translation unit, so mark it
as static.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-5-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: mm: include asm/setup.h for setup_arch_memory()'s prototype

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/init.c:138:13: warning: no previous prototype for function 'setup_arch_memory' [-Wmissing-prototypes]
    138 | void __init setup_arch_memory(void)
        |             ^
  arch/hexagon/mm/init.c:138:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    138 | void __init setup_arch_memory(void)
        | ^
        | static

The prototype is in asm/setup.h, include it to clear up the warning.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-3-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: mm: mark paging_init() as static

2023-12-11T01:21:33+00:00

Clang warns:

  arch/hexagon/mm/init.c:89:13: warning: no previous prototype for function 'paging_init' [-Wmissing-prototypes]
     89 | void __init paging_init(void)
        |             ^
  arch/hexagon/mm/init.c:89:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     89 | void __init paging_init(void)
        | ^
        | static

This function is only used within this translation unit, so mark it static
as suggested.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-2-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: uaccess: remove clear_user_hexagon()

2023-12-11T01:21:33+00:00

Patch series "hexagon: Fix up instances of -Wmissing-prototypes".

This series fixes all the instances of -Wmissing-prototypes in
arch/hexagon, as it is about to be enabled globally in a default build.


This patch (of 19):

Clang warns:

  arch/hexagon/mm/uaccess.c:39:15: warning: no previous prototype for function 'clear_user_hexagon' [-Wmissing-prototypes]
     39 | unsigned long clear_user_hexagon(void __user *dest, unsigned long count)
        |               ^
  arch/hexagon/mm/uaccess.c:39:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     39 | unsigned long clear_user_hexagon(void __user *dest, unsigned long count)
        | ^
        | static
  1 warning generated.

This function appears to have been unused since it was introduced in
commit 7567746e1c0d ("Hexagon: Add user access functions"), so remove it.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-0-5c34714afe9e@kernel.org
Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-1-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: mm: convert to GENERIC_IOREMAP

2023-08-18T17:12:32+00:00

By taking GENERIC_IOREMAP method, the generic ioremap_prot() and iounmap()
are visible and available to arch.  This change will simplify
implementation by removing duplicated code with generic ioremap_prot() and
iounmap(), and has the equivalent functioality.

For hexagon, the current ioremap() and iounmap() are the same as generic
version.  After taking GENERIC_IOREMAP way, the old ioremap() and
iounmap() can be completely removed.

Link: https://lkml.kernel.org/r/20230706154520.11257-3-bhe@redhat.com
Signed-off-by: Baoquan He 
Cc: Brian Cain 
Cc: Alexander Gordeev 
Cc: Arnd Bergmann 
Cc: Catalin Marinas 
Cc: Christian Borntraeger 
Cc: Christophe Leroy 
Cc: Christoph Hellwig 
Cc: Chris Zankel 
Cc: David Laight 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: John Paul Adrian Glaubitz 
Cc: Jonas Bonn 
Cc: Kefeng Wang 
Cc: Matthew Wilcox 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Mike Rapoport (IBM) 
Cc: Nathan Chancellor 
Cc: Nicholas Piggin 
Cc: Niklas Schnelle 
Cc: Rich Felker 
Cc: Stafford Horne 
Cc: Stefan Kristiansson 
Cc: Sven Schnelle 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton