linux.git/arch/hexagon/kernel, branch v6.8

Merge tag 'asm-generic-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2024-01-11T02:13:44+00:00

Pull asm-generic cleanups from Arnd Bergmann:
 "A series from Baoquan He cleans up the asm-generic/io.h to remove the
  ioremap_uc() definition from everything except x86, which still needs
  it for pre-PAT systems. This series notably contains a patch from
  Jiaxun Yang that converts MIPS to use asm-generic/io.h like every
  other architecture does, enabling future cleanups.

  Some of my own patches fix -Wmissing-prototype warnings in
  architecture specific code across several architectures. This is now
  needed as the warning is enabled by default. There are still some
  remaining warnings in minor platforms, but the series should catch
  most of the widely used ones make them more consistent with one
  another.

  David McKay fixes a bug in __generic_cmpxchg_local() when this is used
  on 64-bit architectures. This could currently only affect parisc64 and
  sparc64.

  Additional cleanups address from Linus Walleij, Uwe Kleine-König,
  Thomas Huth, and Kefeng Wang help reduce unnecessary inconsistencies
  between architectures"

* tag 'asm-generic-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: Fix 32 bit __generic_cmpxchg_local
  Hexagon: Make pfn accessors statics inlines
  ARC: mm: Make virt_to_pfn() a static inline
  mips: remove extraneous asm-generic/iomap.h include
  sparc: Use $(kecho) to announce kernel images being ready
  arm64: vdso32: Define BUILD_VDSO32_64 to correct prototypes
  csky: fix arch_jump_label_transform_static override
  arch: add do_page_fault prototypes
  arch: add missing prepare_ftrace_return() prototypes
  arch: vdso: consolidate gettime prototypes
  arch: include linux/cpu.h for trap_init() prototype
  arch: fix asm-offsets.c building with -Wmissing-prototypes
  arch: consolidate arch_irq_work_raise prototypes
  hexagon: Remove CONFIG_HEXAGON_ARCH_VERSION from uapi header
  asm/io: remove unnecessary xlate_dev_mem_ptr() and unxlate_dev_mem_ptr()
  mips: io: remove duplicated codes
  arch/*/io.h: remove ioremap_uc in some architectures
  mips: add  including

hexagon: traps: add internal prototypes for functions only called from asm

2023-12-11T01:21:37+00:00

Clang warns:

  arch/hexagon/kernel/traps.c:284:6: warning: no previous prototype for function 'do_genex' [-Wmissing-prototypes]
    284 | void do_genex(struct pt_regs *regs)
        |      ^
  arch/hexagon/kernel/traps.c:284:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    284 | void do_genex(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/kernel/traps.c:341:6: warning: no previous prototype for function 'do_trap0' [-Wmissing-prototypes]
    341 | void do_trap0(struct pt_regs *regs)
        |      ^
  arch/hexagon/kernel/traps.c:341:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    341 | void do_trap0(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/kernel/traps.c:418:6: warning: no previous prototype for function 'do_machcheck' [-Wmissing-prototypes]
    418 | void do_machcheck(struct pt_regs *regs)
        |      ^
  arch/hexagon/kernel/traps.c:418:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    418 | void do_machcheck(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/kernel/traps.c:428:6: warning: no previous prototype for function 'do_debug_exception' [-Wmissing-prototypes]
    428 | void do_debug_exception(struct pt_regs *regs)
        |      ^
  arch/hexagon/kernel/traps.c:428:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    428 | void do_debug_exception(struct pt_regs *regs)
        | ^
        | static

These functions are only called from assembly or this translation unit,
so just add prototypes right above the definitions to silence the
warnings.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-19-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: traps: remove sys_syscall()

2023-12-11T01:21:37+00:00

Clang warns:

  arch/hexagon/kernel/traps.c:335:6: warning: no previous prototype for function 'sys_syscall' [-Wmissing-prototypes]
    335 | long sys_syscall(void)
        |      ^
  arch/hexagon/kernel/traps.c:335:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    335 | long sys_syscall(void)
        | ^
        | static

This function is not used anywhere, so remove it.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-18-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vm_events: remove unused dummy_handler()

2023-12-11T01:21:37+00:00

Clang warns:

  arch/hexagon/kernel/vm_events.c:76:6: warning: no previous prototype for function 'dummy_handler' [-Wmissing-prototypes]
     76 | void dummy_handler(struct pt_regs *regs)
        |      ^
  arch/hexagon/kernel/vm_events.c:76:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     76 | void dummy_handler(struct pt_regs *regs)
        | ^
        | static

This function appears to be entirely unused, so remove it.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-16-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vdso: include asm/elf.h for arch_setup_additional_pages() prototype

2023-12-11T01:21:36+00:00

Clang warns:

  arch/hexagon/kernel/vdso.c:49:5: warning: no previous prototype for function 'arch_setup_additional_pages' [-Wmissing-prototypes]
     49 | int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
        |     ^
  arch/hexagon/kernel/vdso.c:49:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     49 | int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
        | ^
        | static
  1 warning generated.

Include the header that declares the prototype to clear up the warning.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-15-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: process: add internal prototype for do_work_pending()

2023-12-11T01:21:36+00:00

Clang warns:

  arch/hexagon/kernel/process.c:155:5: warning: no previous prototype for function 'do_work_pending' [-Wmissing-prototypes]
    155 | int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
        |     ^
  arch/hexagon/kernel/process.c:155:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    155 | int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
        | ^
        | static

This function is only referenced from assembly, so it does not technically
need a prototype.  Add one right above the definition anyways to clear up
the warning.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-14-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: process: include linux/cpu.h for arch_cpu_idle() prototype

2023-12-11T01:21:36+00:00

Clang warns:

  arch/hexagon/kernel/process.c:43:6: warning: no previous prototype for function 'arch_cpu_idle' [-Wmissing-prototypes]
     43 | void arch_cpu_idle(void)
        |      ^
  arch/hexagon/kernel/process.c:43:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     43 | void arch_cpu_idle(void)
        | ^
        | static

This prototype is declared in include/linux/cpu.h, include it in
process.c to clear up the warning.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-13-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: reset: include linux/reboot.h for prototypes

2023-12-11T01:21:36+00:00

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

  arch/hexagon/kernel/reset.c:9:6: warning: no previous prototype for function 'machine_power_off' [-Wmissing-prototypes]
      9 | void machine_power_off(void)
        |      ^
  arch/hexagon/kernel/reset.c:9:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      9 | void machine_power_off(void)
        | ^
        | static
  arch/hexagon/kernel/reset.c:15:6: warning: no previous prototype for function 'machine_halt' [-Wmissing-prototypes]
     15 | void machine_halt(void)
        |      ^
  arch/hexagon/kernel/reset.c:15:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     15 | void machine_halt(void)
        | ^
        | static
  arch/hexagon/kernel/reset.c:19:6: warning: no previous prototype for function 'machine_restart' [-Wmissing-prototypes]
     19 | void machine_restart(char *cmd)
        |      ^
  arch/hexagon/kernel/reset.c:19:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     19 | void machine_restart(char *cmd)
        | ^
        | static
  3 warnings generated.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-12-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: signal: switch to SYSCALL_DEFINE0 for sys_rt_sigreturn()

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

Clang warns:

  arch/hexagon/kernel/signal.c:223:16: warning: no previous prototype for function 'sys_rt_sigreturn' [-Wmissing-prototypes]
    223 | asmlinkage int sys_rt_sigreturn(void)
        |                ^
  arch/hexagon/kernel/signal.c:223:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
    223 | asmlinkage int sys_rt_sigreturn(void)
        |            ^
        |            static
  1 warning generated.

Switch to the SYSCALL_DEFINE0() macro, which automatically declares a
prototype.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-11-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: time: include asm/delay.h for prototypes

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

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

  arch/hexagon/kernel/time.c:209:6: warning: no previous prototype for function '__delay' [-Wmissing-prototypes]
    209 | void __delay(unsigned long cycles)
        |      ^
  arch/hexagon/kernel/time.c:209:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    209 | void __delay(unsigned long cycles)
        | ^
        | static
  arch/hexagon/kernel/time.c:224:6: warning: no previous prototype for function '__udelay' [-Wmissing-prototypes]
    224 | void __udelay(unsigned long usecs)
        |      ^
  arch/hexagon/kernel/time.c:224:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    224 | void __udelay(unsigned long usecs)
        | ^
        | static

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-10-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton