From: Peng Hao <flyingpeng@xxxxxxxxxxx>
clang report:
drivers/infiniband/hw/ocrdma/ocrdma_stats.c:686:16: error: stack frame size (20664) exceeds limit (2048) in 'ocrdma_dbgfs_ops_read' [-Werror,-Wframe-larger-than]
static ssize_t ocrdma_dbgfs_ops_read(struct file *filp, char __user *buffer,
^
A 128-byte array is defined in ocrdma_add_stat and is called multiple times
by multiple functions (up to dozens of times), which results in a large amount
of stack space being accumulated in ocrdma_dbgfs_ops_read. mark it as noinline_for_stack
to prevent it from spreading to ocrdma_dbgfs_ops_read's stack size.
Signed-off-by: Peng Hao <flyingpeng@xxxxxxxxxxx>
---
drivers/infiniband/hw/ocrdma/ocrdma_stats.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_stats.c b/drivers/infiniband/hw/ocrdma/ocrdma_stats.c
index 5f831e3bdbad..0b26c4e6de53 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_stats.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_stats.c
@@ -46,7 +46,7 @@
static struct dentry *ocrdma_dbgfs_dir;
-static int ocrdma_add_stat(char *start, char *pcur,
+static noinline_for_stack int ocrdma_add_stat(char *start, char *pcur,
char *name, u64 count)
{
char buff[128] = {0};
--
2.27.0
