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ARM: 7010/1: mm: fix invalid loop for poison_init_mem
poison_init_mem() used a loop of: while ((count = count - 4)) which has 2 problems - an off by one error so that we do one less word than we should, and the other is that if count == 0 then we loop forever and poison too much. On a platform with HAVE_TCM=y but nothing in the TCM's, this caused corruption and the platform failed to boot. Acked-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -441,7 +441,7 @@ static inline int free_area(unsigned long pfn, unsigned long end, char *s)
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static inline void poison_init_mem(void *s, size_t count)
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static inline void poison_init_mem(void *s, size_t count)
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{
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{
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u32 *p = (u32 *)s;
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u32 *p = (u32 *)s;
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while ((count = count - 4))
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for (; count != 0; count -= 4)
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*p++ = 0xe7fddef0;
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*p++ = 0xe7fddef0;
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}
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}
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