[tip: x86/mm] x86/mm: Include spinlock_t definition in pgtable.

[tip-bot2 for Sebastian Andrzej Siewior]

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

Commit-ID:     35fa745286ac44ee26ed100c2bd2553368ad193b
Gitweb:        https://git.kernel.org/tip/35fa745286ac44ee26ed100c2bd2553368ad193b
Author:        Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
AuthorDate:    Tue, 02 Nov 2021 17:52:24 +01:00
Committer:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Thu, 09 Dec 2021 10:58:48 -08:00

x86/mm: Include spinlock_t definition in pgtable.

This header file provides forward declartion for pgd_lock but does not
include the header defining its type. This works since the definition of
spinlock_t is usually included somehow via printk.

By trying to avoid recursive includes on PREEMPT_RT I avoided the loop
in printk and as a consequnce kernel/intel.c failed to compile due to
missing type definition.

Include the needed definition for spinlock_t.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20211102165224.wpz4zyhsvwccx5p3@xxxxxxxxxxxxx
---
 arch/x86/include/asm/pgtable.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 448cd01..a34430b 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -22,6 +22,7 @@
 #define pgprot_decrypted(prot)	__pgprot(__sme_clr(pgprot_val(prot)))
 
 #ifndef __ASSEMBLY__
+#include <linux/spinlock.h>
 #include <asm/x86_init.h>
 #include <asm/pkru.h>
 #include <asm/fpu/api.h>