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compiler: add ALIGN_DOWN macro
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
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@ -89,6 +89,7 @@
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#define round_down(x, y) ((x) & ~__round_mask(x, y))
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#define DIV_ROUND_UP(n, d) (((n) + (d)-1) / (d))
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#define ALIGN(x, a) (((x) + (a)-1) & ~((a)-1))
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#define ALIGN_DOWN(x, a) ALIGN((x) - ((a) - 1), (a))
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#define min(x, y) \
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({ \
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