[PATCH] samples: pidfd: fix userprogs typo

[Sasha Levin]

The Makefile adds pidfd-metadata to "usertprogs-always-y", which kbuild
does not know, so the sample has not been built since the conversion to
userprogs, even with CONFIG_SAMPLE_PIDFD=y.

Fix the variable name. pidfd-metadata.c builds without warnings with
gcc and clang for x86_64 and arm64.

Fixes: 60fb0b1239719 ("samples: pidfd: build sample program for target architecture")
Assisted-by: LLM
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 samples/pidfd/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/pidfd/Makefile b/samples/pidfd/Makefile
index 9754e2d81f70d..d82409f7061f3 100644
--- a/samples/pidfd/Makefile
+++ b/samples/pidfd/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-usertprogs-always-y += pidfd-metadata
+userprogs-always-y += pidfd-metadata
 
 userccflags += -I usr/include
-- 
2.53.0