From: Christoph Hellwig <hch@xxxxxx> Subject: nommu: use flush_icache_user_range in brk and mmap These obviously operate on user addresses. Link: http://lkml.kernel.org/r/20200515143646.3857579-29-hch@xxxxxx Signed-off-by: Christoph Hellwig <hch@xxxxxx> Cc: Greg Ungerer <gerg@xxxxxxxxxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/nommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/nommu.c~nommu-use-flush_icache_user_range-in-brk-and-mmap +++ a/mm/nommu.c @@ -433,7 +433,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) /* * Ok, looks good - let it rip. */ - flush_icache_range(mm->brk, brk); + flush_icache_user_range(mm->brk, brk); return mm->brk = brk; } @@ -1277,7 +1277,7 @@ share: /* we flush the region from the icache only when the first executable * mapping of it is made */ if (vma->vm_flags & VM_EXEC && !region->vm_icache_flushed) { - flush_icache_range(region->vm_start, region->vm_end); + flush_icache_user_range(region->vm_start, region->vm_end); region->vm_icache_flushed = true; } _
