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Date:   Fri, 14 Feb 2020 20:47:25 +0000
From:   Jules Irenge <>
Cc:, Jules Irenge <>,
        Boris Ostrovsky <>,
        Juergen Gross <>,
        Stefano Stabellini <>,
        Thomas Gleixner <>,
        Ingo Molnar <>, Borislav Petkov <>,
        "H. Peter Anvin" <>, (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), (moderated list:XEN HYPERVISOR INTERFACE)
Subject: [PATCH 14/30] x86/xen: Add missing annotation for xen_pte_lock()

Sparse reports warning at xen_pte_lock()

warning: context imbalance in xen_pte_lock() - wrong count at exit

The root cause is the missing annotation at xen_pte_lock()
Add the missing __acquires(ptl) annotation

Signed-off-by: Jules Irenge <>
 arch/x86/xen/mmu_pv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index bbba8b17829a..352f0c80cfcf 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -695,6 +695,7 @@ static int xen_pgd_walk(struct mm_struct *mm,
 /* If we're using split pte locks, then take the page's lock and
    return a pointer to it.  Otherwise return NULL. */
 static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm)
+	__acquires(ptl)
 	spinlock_t *ptl = NULL;

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