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Currently llist_for_each_entry() and llist_for_each_entry_safe() iterate until &pos->member != NULL. But when building the kernel with Clang, the compiler assumes &pos->member cannot be NULL if the member's offset is greater than 0 (which would be equivalent to the object being non-contiguous in memory). Therefore the loop condition is always true, and the loops become infinite. To work around this, introduce the member_address_is_nonnull() macro, which casts object pointer to uintptr_t, thus letting the member pointer to be NULL. Signed-off-by: Alexander Potapenko <glider@google.com> Tested-by: Sodagudi Prasad <psodagud@codeaurora.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| linux | ||
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