[tip: x86/core] x86/syscall/32: Add comment to conditional

[tip-bot2 for Brian Gerst]

The following commit has been merged into the x86/core branch of tip:

Commit-ID:     82070bc0425db949b406ede1c7f066346f5b3eb9
Gitweb:        https://git.kernel.org/tip/82070bc0425db949b406ede1c7f066346f5b3eb9
Author:        Brian Gerst <brgerst@xxxxxxxxx>
AuthorDate:    Fri, 14 Mar 2025 11:12:20 -04:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 19 Mar 2025 11:19:20 +01:00

x86/syscall/32: Add comment to conditional

Add a CONFIG_X86_FRED comment, since this conditional is nested.

Suggested-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Signed-off-by: Brian Gerst <brgerst@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20250314151220.862768-8-brgerst@xxxxxxxxx
---
 arch/x86/entry/syscall_32.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c
index 993d725..2b15ea1 100644
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c
@@ -238,7 +238,8 @@ DEFINE_FREDENTRY_RAW(int80_emulation)
 	instrumentation_end();
 	syscall_exit_to_user_mode(regs);
 }
-#endif
+#endif /* CONFIG_X86_FRED */
+
 #else /* CONFIG_IA32_EMULATION */
 
 /* Handles int $0x80 on a 32bit kernel */