forked from Minki/linux
x86/mm/dump_pagetables: Generalize address normalization
Modify normalize_addr to handle different sizes of virtual address space. It's preparation for enabling 5-level paging. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170716225954.74185-2-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -188,11 +188,12 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg)
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*/
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static unsigned long normalize_addr(unsigned long u)
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{
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#ifdef CONFIG_X86_64
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return (signed long)(u << 16) >> 16;
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#else
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return u;
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#endif
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int shift;
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if (!IS_ENABLED(CONFIG_X86_64))
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return u;
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shift = 64 - (__VIRTUAL_MASK_SHIFT + 1);
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return (signed long)(u << shift) >> shift;
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}
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/*
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