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-rw-r--r--include/asm-generic/page.h38
1 files changed, 4 insertions, 34 deletions
diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
index b55052ce233..a96b5d986b6 100644
--- a/include/asm-generic/page.h
+++ b/include/asm-generic/page.h
@@ -4,51 +4,21 @@
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
-#include <linux/log2.h>
+#include <linux/compiler.h>
-/*
- * non-const pure 2^n version of get_order
- * - the arch may override these in asm/bitops.h if they can be implemented
- * more efficiently than using the arch log2 routines
- * - we use the non-const log2() instead if the arch has defined one suitable
- */
-#ifndef ARCH_HAS_GET_ORDER
-static inline __attribute__((const))
-int __get_order(unsigned long size, int page_shift)
+/* Pure 2^n version of get_order */
+static __inline__ __attribute_const__ int get_order(unsigned long size)
{
-#if BITS_PER_LONG == 32 && defined(ARCH_HAS_ILOG2_U32)
- int order = __ilog2_u32(size) - page_shift;
- return order >= 0 ? order : 0;
-#elif BITS_PER_LONG == 64 && defined(ARCH_HAS_ILOG2_U64)
- int order = __ilog2_u64(size) - page_shift;
- return order >= 0 ? order : 0;
-#else
int order;
- size = (size - 1) >> (page_shift - 1);
+ size = (size - 1) >> (PAGE_SHIFT - 1);
order = -1;
do {
size >>= 1;
order++;
} while (size);
return order;
-#endif
}
-#endif
-
-/**
- * get_order - calculate log2(pages) to hold a block of the specified size
- * @n - size
- *
- * calculate allocation order based on the current page size
- * - this can be used to initialise global variables from constant data
- */
-#define get_order(n) \
-( \
- __builtin_constant_p(n) ? \
- ((n < (1UL << PAGE_SHIFT)) ? 0 : ilog2(n) - PAGE_SHIFT) : \
- __get_order(n, PAGE_SHIFT) \
- )
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */