diff options
| author | Kirill A. Shutemov <[email protected]> | 2017-07-17 01:59:47 +0300 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-07-21 10:05:17 +0200 |
| commit | 3a366f791d83c690f3042e37f410f38de04fb4c7 (patch) | |
| tree | 3dd47fe8d05f35acaf13d4f3241ba5e8ab8eb802 | |
| parent | 693bf0aa01b7f9a1b24b2b932d555c6667f17a1a (diff) | |
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 <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/mm/dump_pagetables.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 0470826d2bdc..a824d575bb84 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -188,11 +188,12 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg) */ static unsigned long normalize_addr(unsigned long u) { -#ifdef CONFIG_X86_64 - return (signed long)(u << 16) >> 16; -#else - return u; -#endif + int shift; + if (!IS_ENABLED(CONFIG_X86_64)) + return u; + + shift = 64 - (__VIRTUAL_MASK_SHIFT + 1); + return (signed long)(u << shift) >> shift; } /* |