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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 14:15:47 +0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-06 14:15:47 +0300 |
commit | 94fb1afb14c4f0ceb8c5508ddddac6819f662e95 (patch) | |
tree | 4988e5769dc7482caa7f441475ae31f50bbd37ef /arch/unicore32/mm/flush.c | |
parent | c4735d990268399da9133b0ad445e488ece009ad (diff) | |
parent | 47ec5303d73ea344e84f46660fff693c57641386 (diff) | |
download | linux-94fb1afb14c4f0ceb8c5508ddddac6819f662e95.tar.xz |
Mgerge remote-tracking branch 'torvalds/master' into perf/core
To sync headers, for instance, in this case tools/perf was ahead of
upstream till Linus merged tip/perf/core to get the
PERF_RECORD_TEXT_POKE changes:
Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/unicore32/mm/flush.c')
-rw-r--r-- | arch/unicore32/mm/flush.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/arch/unicore32/mm/flush.c b/arch/unicore32/mm/flush.c deleted file mode 100644 index 65954f8d89a2..000000000000 --- a/arch/unicore32/mm/flush.c +++ /dev/null @@ -1,94 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/unicore32/mm/flush.c - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/module.h> -#include <linux/mm.h> -#include <linux/pagemap.h> - -#include <asm/cacheflush.h> -#include <asm/tlbflush.h> - -void flush_cache_mm(struct mm_struct *mm) -{ -} - -void flush_cache_range(struct vm_area_struct *vma, unsigned long start, - unsigned long end) -{ - if (vma->vm_flags & VM_EXEC) - __flush_icache_all(); -} - -void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, - unsigned long pfn) -{ -} - -static void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, - unsigned long uaddr, void *kaddr, unsigned long len) -{ - /* VIPT non-aliasing D-cache */ - if (vma->vm_flags & VM_EXEC) { - unsigned long addr = (unsigned long)kaddr; - - __cpuc_coherent_kern_range(addr, addr + len); - } -} - -/* - * Copy user data from/to a page which is mapped into a different - * processes address space. Really, we want to allow our "user - * space" model to handle this. - * - * Note that this code needs to run on the current CPU. - */ -void copy_to_user_page(struct vm_area_struct *vma, struct page *page, - unsigned long uaddr, void *dst, const void *src, - unsigned long len) -{ - memcpy(dst, src, len); - flush_ptrace_access(vma, page, uaddr, dst, len); -} - -void __flush_dcache_page(struct address_space *mapping, struct page *page) -{ - /* - * Writeback any data associated with the kernel mapping of this - * page. This ensures that data in the physical page is mutually - * coherent with the kernels mapping. - */ - __cpuc_flush_kern_dcache_area(page_address(page), PAGE_SIZE); -} - -/* - * Ensure cache coherency between kernel mapping and userspace mapping - * of this page. - */ -void flush_dcache_page(struct page *page) -{ - struct address_space *mapping; - - /* - * The zero page is never written to, so never has any dirty - * cache lines, and therefore never needs to be flushed. - */ - if (page == ZERO_PAGE(0)) - return; - - mapping = page_mapping_file(page); - - if (mapping && !mapping_mapped(mapping)) - clear_bit(PG_dcache_clean, &page->flags); - else { - __flush_dcache_page(mapping, page); - if (mapping) - __flush_icache_all(); - set_bit(PG_dcache_clean, &page->flags); - } -} -EXPORT_SYMBOL(flush_dcache_page); |