util: make calling remove_from_list multiple times in a row safe
This commit fixes an infinite loop in foreach_s if remove_from_list is used more than once on the same item with other list operations in between. NOTE: This is a candidate for the 7.9 branch because the commit "r300g: fixup long-lived BO maps being incorrectly unmapped when flushing" depends on it.
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@ -46,6 +46,8 @@
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do { \
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(elem)->next->prev = (elem)->prev; \
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(elem)->prev->next = (elem)->next; \
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(elem)->next = elem; \
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(elem)->prev = elem; \
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} while (0)
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/**
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