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Since at least kernel 6.1, flush_dcache_page() is called with IRQs disabled, e.g. from aio_complete(). But the current implementation for flush_dcache_page() on NIOS2 unintentionally re-enables IRQs, which may lead to deadlocks. Fix it by using xa_lock_irqsave() and xa_unlock_irqrestore() for the flush_dcache_mmap_*lock() macros instead. Link: https://lkml.kernel.org/r/ZOTF5WWURQNH9+iw@p100 Signed-off-by: Helge Deller <deller@gmx.de> Cc: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*
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* Copyright (C) 2003 Microtronix Datacom Ltd.
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* Copyright (C) 2000-2002 Greg Ungerer <gerg@snapgear.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_NIOS2_CACHEFLUSH_H
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#define _ASM_NIOS2_CACHEFLUSH_H
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#include <linux/mm_types.h>
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/*
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* This flag is used to indicate that the page pointed to by a pte is clean
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* and does not require cleaning before returning it to the user.
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*/
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#define PG_dcache_clean PG_arch_1
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struct mm_struct;
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extern void flush_cache_all(void);
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extern void flush_cache_mm(struct mm_struct *mm);
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extern void flush_cache_dup_mm(struct mm_struct *mm);
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extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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extern void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
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unsigned long pfn);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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void flush_dcache_page(struct page *page);
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void flush_dcache_folio(struct folio *folio);
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#define flush_dcache_folio flush_dcache_folio
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extern void flush_icache_range(unsigned long start, unsigned long end);
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void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
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unsigned int nr);
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#define flush_icache_pages flush_icache_pages
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#define flush_cache_vmap(start, end) flush_dcache_range(start, end)
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#define flush_cache_vunmap(start, end) flush_dcache_range(start, end)
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extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long user_vaddr,
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void *dst, void *src, int len);
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extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long user_vaddr,
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void *dst, void *src, int len);
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extern void flush_dcache_range(unsigned long start, unsigned long end);
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extern void invalidate_dcache_range(unsigned long start, unsigned long end);
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#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&mapping->i_pages)
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#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
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#define flush_dcache_mmap_lock_irqsave(mapping, flags) \
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xa_lock_irqsave(&mapping->i_pages, flags)
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#define flush_dcache_mmap_unlock_irqrestore(mapping, flags) \
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xa_unlock_irqrestore(&mapping->i_pages, flags)
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#endif /* _ASM_NIOS2_CACHEFLUSH_H */
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