kernel/linux.git/arch/arc/include/asm/mmu.h, branch linux-7.0.y

ARC: Replace ASSEMBLY with ASSEMBLER in the non-uapi headers

2025-06-09T16:18:12+00:00

While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: linux-snps-arc@lists.infradead.org Signed-off-by: Thomas Huth Signed-off-by: Vineet Gupta

arc: get rid of private asm/unaligned.h

2024-10-02T21:22:47+00:00

Declarations local to arch/*/kernel/*.c are better off *not* in a public header - arch/arc/kernel/unaligned.h is just fine for those bits. Unlike the parisc case, here we have an extra twist - asm/mmu.h has an implicit dependency on struct pt_regs, and in some users that used to be satisfied by include of asm/ptrace.h from asm/unaligned.h (note that asm/mmu.h itself did _not_ pull asm/unaligned.h - it relied upon the users having pulled asm/unaligned.h before asm/mmu.h got there). Seeing that asm/mmu.h only wants struct pt_regs * arguments in an extern, just pre-declare it there - less brittle that way. With that done _all_ asm/unaligned.h instances are reduced to include of asm-generic/unaligned.h and can be removed - unaligned.h is in mandatory-y in include/asm-generic/Kbuild. What's more, we can move asm-generic/unaligned.h to linux/unaligned.h and switch includes of to ; that's better off as an auto-generated commit, though, to be done by Linus at -rc1 time next cycle. Acked-by: Vineet Gupta Signed-off-by: Al Viro

ARC: -Wmissing-prototype warning fixes

2023-08-13T23:53:02+00:00

Anrd reported [1] new compiler warnings due to -Wmissing-protype. These are for non static functions mostly used in asm code hence not exported already. Fix this by adding the prototypes. [1] https://lore.kernel.org/lkml/20230810141947.1236730-1-arnd@kernel.org Reviewed-by: Arnd Bergmann Signed-off-by: Vineet Gupta

ARC: mm: disintegrate mmu.h (arcv2 bits out)

2021-08-25T22:53:19+00:00

non functional change Tested-by: kernel test robot Signed-off-by: Vineet Gupta

ARC: mm: move MMU specific bits out of entry code ...

2021-08-24T21:25:48+00:00

... to avoid polluting shared entry code (across three ISA variants) with ISA/MMU specific code. Cc: Jose Abreu Signed-off-by: Vineet Gupta

ARC: mm: move MMU specific bits out of ASID allocator

2021-08-24T21:25:48+00:00

And while at it, rewrite commentary on ASID allocator Signed-off-by: Vineet Gupta

ARC: mm: move mmu/cache externs out to setup.h

2021-08-24T21:25:48+00:00

Don't pollute mmu.h and cache.h with ARC internal bootlog/setup related functions. Move them aside to setup.h Signed-off-by: Vineet Gupta

ARC: mm: remove tlb paranoid code

2021-08-24T21:25:48+00:00

This was used back in arc700 days when ASID allocator was fragile. Not needed in last 5 years Signed-off-by: Vineet Gupta

ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only

2021-08-24T21:25:48+00:00

MMU SCRATCH_DATA0 register is intended to cache task pgd. However in ARC700 SMP port, it has to be repurposed for re-entrant interrupt handling, while UP port doesn't. We currently handle these use-cases using a fabricated #define which has usual issues of dependency nesting and obvious ugliness. So clean this up: for ARC700 don't use to cache pgd (even in UP) and do the opposite for ARCv2. And while here, switch to canonical pgd_offset(). Acked-by: Mike Rapoport Signed-off-by: Vineet Gupta

ARC: retire MMUv1 and MMUv2 support

2021-08-24T21:25:47+00:00

There's no known/active customer using them with latest kernels anyways. Removal helps cleanup code and remove the hack for MMU_VER to MMU_V[3-4] conversion Signed-off-by: Vineet Gupta

kernel/linux.git/arch/arc/include/asm/mmu.h, branch linux-7.0.y

ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers

arc: get rid of private asm/unaligned.h

ARC: -Wmissing-prototype warning fixes

ARC: mm: disintegrate mmu.h (arcv2 bits out)

ARC: mm: move MMU specific bits out of entry code ...

ARC: mm: move MMU specific bits out of ASID allocator

ARC: mm: move mmu/cache externs out to setup.h

ARC: mm: remove tlb paranoid code

ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only

ARC: retire MMUv1 and MMUv2 support

ARC: Replace ASSEMBLY with ASSEMBLER in the non-uapi headers