microblaze: Prevent the overflow of the start
[ Upstream commit 061d2c1d59
]
In case the start + cache size is more than the max int the
start overflows.
Prevent the same.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -92,7 +92,8 @@ static inline void __disable_dcache_nomsr(void)
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#define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size) \
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do { \
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int align = ~(cache_line_length - 1); \
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end = min(start + cache_size, end); \
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if (start < UINT_MAX - cache_size) \
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end = min(start + cache_size, end); \
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start &= align; \
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} while (0)
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