Impact of removing VM_EXEC from brk area

A patch to remove VM_EXEC from VM_DATA_DEFAULT_FLAGS for MIPS has been submitted to me with the primary motivation for this change being some performance improvment. In other words, the patch would remove execute permission from a process brk area. It's however unclear to me how much software wreckage would result from such a change, even if the execute permission for the stack area remains unchanged.

So, what would break?

Thanks,

Ralf

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