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freertos: Make xPortGetCoreID() volatile

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When xPortGetCoreID() is called twice within a function,
it might only be called once after compilation. This
commit makes the inline assembly of the function volatile.

Closes #3093
This commit is contained in:
Darian Leung 2019-02-26 20:58:02 +08:00
parent 59b4091fe5
commit 5bbb991c90
1 changed files with 1 additions and 1 deletions
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2
components/freertos/include/freertos/portable.h
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@ -199,7 +199,7 @@ BaseType_t xPortInIsrContext();
/* Multi-core: get current core ID */
static inline uint32_t IRAM_ATTR xPortGetCoreID() {
int id;
asm (
__asm__ __volatile__ (
"rsr.prid %0\n"
" extui %0,%0,13,1"
:"=r"(id));