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x86/stackprotector/64: Only export __ref_stack_chk_guard on CONFIG_SMP

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[ Upstream commit 91d5451d97ce35cbd510277fa3b7abf9caa4e34d ]

The __ref_stack_chk_guard symbol doesn't exist on UP:

  <stdin>:4:15: error: ‘__ref_stack_chk_guard’ undeclared here (not in a function)

Fix the #ifdef around the entry.S export.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Uros Bizjak <ubizjak@gmail.com>
Link: https://lore.kernel.org/r/20250123190747.745588-8-brgerst@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ingo Molnar
2025-03-12 12:48:49 +01:00
committed by Greg Kroah-Hartman
parent 1752ceaa72
commit 7124a9b682
1 changed files with 1 additions and 1 deletions
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arch/x86/entry/entry.S
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@@ -59,7 +59,7 @@ EXPORT_SYMBOL_GPL(mds_verw_sel);
* entirely in the C code, and use an alias emitted by the linker script
* instead.
*/
#ifdef CONFIG_STACKPROTECTOR
#if defined(CONFIG_STACKPROTECTOR) && defined(CONFIG_SMP)
EXPORT_SYMBOL(__ref_stack_chk_guard);
#endif
#endif