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Gregory Nutt 2015-07-10 08:45:35 -06:00
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@ -10678,3 +10678,17 @@
From Sebastien Lorquet
* arch/arm/src/lpc43xx/chip/lpc4310203050_pinconfig.h: Correct some
LPC4350 GPIO pin configurations. From Alessandro Temil (2015-07-09).
* mm/umm_heap, include/nuttx/kmalloc.h, userspace.h, mm/mm.h, and all
configurations that support protected mode: Redesigned how the user
space heap is accessed from the kernel code in protected mode. It
used to call memory management functions in user space via function
pointers in the userspace interface. That is inefficient because the
first thing that those memory management functions do is to trap back
into the kernel to get the current PID. Worse, that operation can be
fatal is certain fragile situations such as when a task is exiting.
The solution is to remove all of the memory management function calls
from the interface. Instead, the interface exports the users pace
heap structure and then kernel size implementations of those memory
management functions will operate on the userspace heap structure.
This avoids the unnecessary system calls and, more importantly,
failures do to freeing memory when a test exits (2015-07-10).