[PATCH 1/2] [xarry]:Fixed an issue with memory allocated using the GFP_KERNEL flag in spinlocks

[xiaofeng.yan]

From: "xiaofeng.yan" <yanxiaofe...@jd.com>

function xa_store_irq() has a spinlock as follows:
 xa_lock_irq()
   -->spin_lock_irq(&(xa)->xa_lock)
GFP_KERNEL flag could cause sleep.
So change GFP_KERNEL to  GFP_ATOMIC and Romve "gfp_t gfp" in function
static inline void *xa_store_irq(struct xarray *xa, unsigned long index,
                void *entry, gfp_t gfp)

Signed-off-by: xiaofeng.yan <yanxiaofe...@jd.com>
---
 include/linux/xarray.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index 92c0160b3352..aeaf97d5642f 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -595,7 +595,6 @@ static inline void *xa_store_bh(struct xarray *xa, unsigned 
long index,
  * @xa: XArray.
  * @index: Index into array.
  * @entry: New entry.
- * @gfp: Memory allocation flags.
  *
  * This function is like calling xa_store() except it disables interrupts
  * while holding the array lock.
@@ -605,12 +604,12 @@ static inline void *xa_store_bh(struct xarray *xa, 
unsigned long index,
  * Return: The old entry at this index or xa_err() if an error happened.
  */
 static inline void *xa_store_irq(struct xarray *xa, unsigned long index,
-               void *entry, gfp_t gfp)
+               void *entry)
 {
        void *curr;
 
        xa_lock_irq(xa);
-       curr = __xa_store(xa, index, entry, gfp);
+       curr = __xa_store(xa, index, entry, GFP_ATOMIC);
        xa_unlock_irq(xa);
 
        return curr;
-- 
2.17.1