From: Matt Mackall Date: Sat, 9 Feb 2008 08:10:12 +0000 (-0800) Subject: Fix compile error on nommu for is_swap_pte X-Git-Tag: v2.6.25-rc1~28 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=880cdf3a8122288d37829ce01eadf8822bb386db;p=linux-2.6-omap-h63xx.git Fix compile error on nommu for is_swap_pte CC mm/vmscan.o In file included from /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/vmscan.c:44: /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h: In function 'is_swap_pte': /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h:48: error: implicit declaration of function 'pte_none' /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h:48: error: implicit declaration of function 'pte_present' Does it ever make sense to ask "is this pte a swap entry?" on a machine with no MMU? Presumably this also means it has no ptes too, right? In which case, it's better to comment the whole function out. Then when someone tries to ask the above meaningless question, they get a compile error rather than a meaningless answer. Signed-off-by: Matt Mackall Cc: Mike Frysinger Reported-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/swapops.h b/include/linux/swapops.h index 7bf2d149d20..6ec39ab27b4 100644 --- a/include/linux/swapops.h +++ b/include/linux/swapops.h @@ -42,11 +42,13 @@ static inline pgoff_t swp_offset(swp_entry_t entry) return entry.val & SWP_OFFSET_MASK(entry); } +#ifdef CONFIG_MMU /* check whether a pte points to a swap entry */ static inline int is_swap_pte(pte_t pte) { return !pte_none(pte) && !pte_present(pte) && !pte_file(pte); } +#endif /* * Convert the arch-dependent pte representation of a swp_entry_t into an