[PATCH] workqueue: fix enum type for gcc-13

[Arnd Bergmann]

From: Arnd Bergmann <arnd@xxxxxxxx>

In gcc-13, the WORK_STRUCT_WQ_DATA_MASK constant is a signed 64-bit
type on 32-bit architectures because the enum definition has both
negative numbers and numbers above LONG_MAX in it:

kernel/workqueue.c: In function 'get_work_pwq':
kernel/workqueue.c:709:24: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  709 |                 return (void *)(data & WORK_STRUCT_WQ_DATA_MASK);
      |                        ^
kernel/workqueue.c: In function 'get_work_pool':
kernel/workqueue.c:737:25: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  737 |                 return ((struct pool_workqueue *)
      |                         ^
kernel/workqueue.c: In function 'get_work_pool_id':
kernel/workqueue.c:759:25: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  759 |                 return ((struct pool_workqueue *)
      |                         ^

Change the enum definition to ensure all values can fit into
the range of 'unsigned long' on all architectures.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 include/linux/workqueue.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index ac551b8ee7d9..fba8d0154a1e 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -83,7 +83,7 @@ enum {
 
 	/* convenience constants */
 	WORK_STRUCT_FLAG_MASK	= (1UL << WORK_STRUCT_FLAG_BITS) - 1,
-	WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK,
+	WORK_STRUCT_WQ_DATA_MASK = (unsigned long)~WORK_STRUCT_FLAG_MASK,
 	WORK_STRUCT_NO_POOL	= (unsigned long)WORK_OFFQ_POOL_NONE << WORK_OFFQ_POOL_SHIFT,
 
 	/* bit mask for work_busy() return values */
-- 
2.39.0