From b2dd3f00f0617abd5757ca75a5579d493dc8bd85 Mon Sep 17 00:00:00 2001
From: Meco Man <920369182@qq.com>
Date: Mon, 7 Jun 2021 16:45:39 +0800
Subject: [PATCH] =?UTF-8?q?[bug][kernel][heap]=20=E5=B0=86=E5=86=85?=
 =?UTF-8?q?=E5=AD=98=E5=A0=86=E4=BF=9D=E6=8A=A4=E6=9C=BA=E5=88=B6=E7=94=B1?=
 =?UTF-8?q?FIFO=E6=94=B9=E4=B8=BAPRIO?=
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---
 src/mem.c     | 2 +-
 src/memheap.c | 2 +-
 src/slab.c    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/mem.c b/src/mem.c
index ac0d27f2c3..2b4d3a03be 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -250,7 +250,7 @@ void rt_system_heap_init(void *begin_addr, void *end_addr)
     rt_mem_setname(heap_end, "INIT");
 #endif
 
-    rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_FIFO);
+    rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_PRIO);
 
     /* initialize the lowest-free pointer to the start of the heap */
     lfree = (struct heap_mem *)heap_ptr;
diff --git a/src/memheap.c b/src/memheap.c
index 35a04c14b1..d3ad6d2c36 100644
--- a/src/memheap.c
+++ b/src/memheap.c
@@ -155,7 +155,7 @@ rt_err_t rt_memheap_init(struct rt_memheap *memheap,
     item->next_free = item->prev_free = RT_NULL;
 
     /* initialize semaphore lock */
-    rt_sem_init(&(memheap->lock), name, 1, RT_IPC_FLAG_FIFO);
+    rt_sem_init(&(memheap->lock), name, 1, RT_IPC_FLAG_PRIO);
 
     RT_DEBUG_LOG(RT_DEBUG_MEMHEAP,
                  ("memory heap: start addr 0x%08x, size %d, free list header 0x%08x\n",
diff --git a/src/slab.c b/src/slab.c
index 114259002f..2769892b68 100644
--- a/src/slab.c
+++ b/src/slab.c
@@ -363,7 +363,7 @@ void rt_system_heap_init(void *begin_addr, void *end_addr)
     npages  = limsize / RT_MM_PAGE_SIZE;
 
     /* initialize heap semaphore */
-    rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_FIFO);
+    rt_sem_init(&heap_sem, "heap", 1, RT_IPC_FLAG_PRIO);
 
     RT_DEBUG_LOG(RT_DEBUG_SLAB, ("heap[0x%x - 0x%x], size 0x%x, 0x%x pages\n",
                                  heap_start, heap_end, limsize, npages));