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md: Fix userspace free_pages() macro
While using etags to find free_pages(), I stumbled across this debug definition of free_pages() that is to be used while debugging some raid code in userspace. The __get_free_pages() allocates the correct size, but the free_pages() does not match. free_pages(), like __get_free_pages(), takes an order and not a size. Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -132,7 +132,7 @@ void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
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PROT_READ|PROT_WRITE, \
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MAP_PRIVATE|MAP_ANONYMOUS,\
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0, 0))
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# define free_pages(x, y) munmap((void *)(x), (y)*PAGE_SIZE)
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# define free_pages(x, y) munmap((void *)(x), PAGE_SIZE << (y))
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static inline void cpu_relax(void)
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{
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