linux-kernel - [PATCH 15/30] x86/xen: Add missing annotation for xen_pte

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Message-Id: <20200214204741.94112-16-jbi.octave@gmail.com>
Date:   Fri, 14 Feb 2020 20:47:26 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     boqun.feng@...il.com, Jules Irenge <jbi.octave@...il.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        xen-devel@...ts.xenproject.org (moderated list:XEN HYPERVISOR INTERFACE)
Subject: [PATCH 15/30] x86/xen: Add missing annotation for xen_pte_unlock()

Sparse reports warning at xen_pte_unlock()

warning: context imbalance in xen_pte_unlock() - unexpected unlock

The root cause is the missing annotation at xen_pte_unlock()
Add the missing __releases(ptl) annotation

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 arch/x86/xen/mmu_pv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 352f0c80cfcf..777008f8c668 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -707,7 +707,7 @@ static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm)
 	return ptl;
 }
 
-static void xen_pte_unlock(void *v)
+static void xen_pte_unlock(void *v) __releases(ptl)
 {
 	spinlock_t *ptl = v;
 	spin_unlock(ptl);
-- 
2.24.1