(Oops. CC: lists) Kirill A. Shutemov wrote: > There's no reason to enable split page table lock if don't have page > tables. > > It also triggers build error at least on ARM since we don't define > pmd_page() for !MMU. > > In file included from arch/arm/kernel/asm-offsets.c:14:0: > include/linux/mm.h: In function 'pte_lockptr': > include/linux/mm.h:1392:2: error: implicit declaration of function 'pmd_page' > [-Werror=implicit-function-declaration] > include/linux/mm.h:1392:2: warning: passing argument 1 of 'ptlock_ptr' makes > pointer from integer without a cast [enabled by default] > include/linux/mm.h:1384:27: note: expected 'struct page *' but argument is of > type 'int' > > Reported-by: Uwe Kleine-König <[email protected]> > Signed-off-by: Kirill A. Shutemov <[email protected]> > --- > mm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/Kconfig b/mm/Kconfig > index 2d9f1504d75e..90bd85ea6035 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -216,6 +216,7 @@ config PAGEFLAGS_EXTENDED > # > config SPLIT_PTLOCK_CPUS > int > + default "999999" if !MMU > default "999999" if ARM && !CPU_CACHE_VIPT > default "999999" if PARISC && !PA20 > default "4" > -- > 1.9.0
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