[PATCH 4.19 17/37] elfcore: correct reference to CONFIG_UML

[Greg Kroah-Hartman]

From: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>

commit b0e901280d9860a0a35055f220e8e457f300f40a upstream.

Commit 6e7b64b9dd6d ("elfcore: fix building with clang") introduces
special handling for two architectures, ia64 and User Mode Linux.
However, the wrong name, i.e., CONFIG_UM, for the intended Kconfig
symbol for User-Mode Linux was used.

Although the directory for User Mode Linux is ./arch/um; the Kconfig
symbol for this architecture is called CONFIG_UML.

Luckily, ./scripts/checkkconfigsymbols.py warns on non-existing configs:

  UM
  Referencing files: include/linux/elfcore.h
  Similar symbols: UML, NUMA

Correct the name of the config to the intended one.

[akpm@xxxxxxxxxxxxxxxxxxxx: fix um/x86_64, per Catalin]
  Link: https://lkml.kernel.org/r/20211006181119.2851441-1-catalin.marinas@xxxxxxx
  Link: https://lkml.kernel.org/r/YV6pejGzLy5ppEpt@xxxxxxx

Link: https://lkml.kernel.org/r/20211006082209.417-1-lukas.bulwahn@xxxxxxxxx
Fixes: 6e7b64b9dd6d ("elfcore: fix building with clang")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Barret Rhoden <brho@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 include/linux/elfcore.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/elfcore.h
+++ b/include/linux/elfcore.h
@@ -58,7 +58,7 @@ static inline int elf_core_copy_task_xfp
 }
 #endif
 
-#if defined(CONFIG_UM) || defined(CONFIG_IA64)
+#if (defined(CONFIG_UML) && defined(CONFIG_X86_32)) || defined(CONFIG_IA64)
 /*
  * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
  * extra segments containing the gate DSO contents.  Dumping its