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arm64 fixes/cleanups:

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- Add brackets to the io_stop_wc macro.
 
 - Avoid -Warray-bounds warning with the LSE atomics inline asm.
 
 - Apply __ro_after_init to memory_limit.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes/cleanups from Catalin Marinas:
 "Some fixes that turned up during the merge window:

   - Add brackets to the io_stop_wc macro

   - Avoid -Warray-bounds warning with the LSE atomics inline asm

   - Apply __ro_after_init to memory_limit"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: apply __ro_after_init to memory_limit
  arm64: atomics: lse: Dereference matching size
  asm-generic: Add missing brackets for io_stop_wc macro
This commit is contained in:
Linus Torvalds 2022-01-22 09:22:10 +02:00
commit b21bae9af1
4 changed files with 4 additions and 4 deletions
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2
arch/arm64/include/asm/atomic_lse.h
View File

@ -249,7 +249,7 @@ __lse__cmpxchg_case_##name##sz(volatile void *ptr, \
" mov %" #w "[tmp], %" #w "[old]\n" \
" cas" #mb #sfx "\t%" #w "[tmp], %" #w "[new], %[v]\n" \
" mov %" #w "[ret], %" #w "[tmp]" \
: [ret] "+r" (x0), [v] "+Q" (*(unsigned long *)ptr), \
: [ret] "+r" (x0), [v] "+Q" (*(u##sz *)ptr), \
[tmp] "=&r" (tmp) \
: [old] "r" (x1), [new] "r" (x2) \
: cl); \

2
arch/arm64/include/asm/cmpxchg.h
View File

@ -243,7 +243,7 @@ static inline void __cmpwait_case_##sz(volatile void *ptr, \
" cbnz %" #w "[tmp], 1f\n" \
" wfe\n" \
"1:" \
: [tmp] "=&r" (tmp), [v] "+Q" (*(unsigned long *)ptr) \
: [tmp] "=&r" (tmp), [v] "+Q" (*(u##sz *)ptr) \
: [val] "r" (val)); \
}

2
arch/arm64/mm/init.c
View File

@ -172,7 +172,7 @@ int pfn_is_map_memory(unsigned long pfn)
}
EXPORT_SYMBOL(pfn_is_map_memory);
static phys_addr_t memory_limit = PHYS_ADDR_MAX;
static phys_addr_t memory_limit __ro_after_init = PHYS_ADDR_MAX;
/*
* Limit the memory size that was specified via FDT.

2
include/asm-generic/barrier.h
View File

@ -285,7 +285,7 @@ do { \
* write-combining memory accesses before this macro with those after it.
*/
#ifndef io_stop_wc
#define io_stop_wc do { } while (0)
#define io_stop_wc() do { } while (0)
#endif
#endif /* !__ASSEMBLY__ */