linux-kernel - [tip: locking/core] x86/mm: Include spinlock

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Date:   Tue, 07 Dec 2021 14:22:01 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] x86/mm: Include spinlock_t definition in pgtable.

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

Commit-ID:     0cf292b569bc9bc87d29ac87ca5c47fdd5882e10
Gitweb:        https://git.kernel.org/tip/0cf292b569bc9bc87d29ac87ca5c47fdd5882e10
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Mon, 29 Nov 2021 18:46:53 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 07 Dec 2021 15:14:12 +01:00

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@...utronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20211129174654.668506-11-bigeasy@linutronix.de
---
 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>