kfdtest: Correct mmap return value checking

On error mmap returns value MAP_FAILED, which is (void *)-1, not NULL
pointer.

Change-Id: I81b187266c943fa0aa4fab21b529d4c2989b12ad
Signed-off-by: Philip Yang <Philip.Yang@amd.com>

tests/kfdtest/src/KFDSVMEvictTest.cpp

@@ -88,7 +88,7 @@ void KFDSVMEvictTest::AllocBuffers(HSAuint32 defaultGPUNode, HSAuint32 count, HS
 
     for (HSAuint32 i = 0; i < count; i++) {
         m_pBuf = mmap(0, vramBufSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-        EXPECT_NOTNULL(m_pBuf);
+        ASSERT_NE(MAP_FAILED, m_pBuf);
 
         m_Flags = (HSA_SVM_FLAGS)0;
 retry:

tests/kfdtest/src/KFDSVMRangeTest.cpp

@@ -1254,7 +1254,7 @@ TEST_F(KFDSVMRangeTest, MigrateFileBackedRangeTest) {
     ASSERT_EQ(size, write(fd, buf, size));
 
     void *MmapedFile = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    ASSERT_NE(nullptr, MmapedFile);
+    ASSERT_NE(MAP_FAILED, MmapedFile);
 
     HsaSVMRange filebackedRange(MmapedFile, size, defaultGPUNode, defaultGPUNode);
 
@@ -1531,7 +1531,7 @@ TEST_F(KFDSVMRangeTest, VramOvercommitTest) {
 
     for (i = 0; i < numBufs; i++) {
         pBuf[i] = mmap(0, BufSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-        ASSERT_NOTNULL(pBuf[i]);
+        ASSERT_NE(MAP_FAILED, pBuf[i]);
 
         ret = RegisterSVMRange(defaultGPUNode, pBuf[i], BufSize, defaultGPUNode, 0);
         if (ret != HSAKMT_STATUS_SUCCESS)
@@ -1587,7 +1587,7 @@ TEST_F(KFDSVMRangeTest, VramOvercommitGiantRangeTest) {
     void *pBuf;
 
     pBuf = mmap(0, BufSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-    ASSERT_NOTNULL(pBuf);
+    ASSERT_NE(MAP_FAILED, pBuf);
 
     ret = RegisterSVMRange(defaultGPUNode, pBuf, BufSize, defaultGPUNode, 0);
     EXPECT_EQ (HSAKMT_STATUS_SUCCESS, ret);
@@ -1623,7 +1623,7 @@ TEST_F(KFDSVMRangeTest, PrefaultPartialRangeTest) {
     char *pBuf;
 
     pBuf = (char *)mmap(0, BufSize, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-    ASSERT_NOTNULL(pBuf);
+    ASSERT_NE(MAP_FAILED, pBuf);
 
     memset(pBuf + PAGE_SIZE, 0x2, PAGE_SIZE);
     memset(pBuf + 2 * PAGE_SIZE, 0x3, PAGE_SIZE);

tests/kfdtest/src/KFDTestUtil.cpp

@@ -862,7 +862,7 @@ HsaSVMRange::HsaSVMRange(void *addr, HSAuint64 size, HSAuint32 GPUNode, HSAuint3
     m_SelfAllocated(false) {
     if (!m_pUser) {
         m_pUser = mmap(0, m_Size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-        EXPECT_NOTNULL(m_pUser);
+        EXPECT_NE(MAP_FAILED, m_pUser);
         m_SelfAllocated = true;
     }