fs: don't compile in drop_caches.c when CONFIG_SYSCTL=n
drop_caches.c provides code only invokable via sysctl, so don't compile it in when CONFIG_SYSCTL=n. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds

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146732ce10
@@ -1731,8 +1731,12 @@ int in_gate_area_no_mm(unsigned long addr);
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#define in_gate_area(mm, addr) ({(void)mm; in_gate_area_no_mm(addr);})
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#endif /* __HAVE_ARCH_GATE_AREA */
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#ifdef CONFIG_SYSCTL
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extern int sysctl_drop_caches;
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int drop_caches_sysctl_handler(struct ctl_table *, int,
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void __user *, size_t *, loff_t *);
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#endif
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unsigned long shrink_slab(struct shrink_control *shrink,
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unsigned long nr_pages_scanned,
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unsigned long lru_pages);
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