linux-kernel - [PATCH v1 3/6] rqchip/gic-v3-its: add reset pending table function

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Date:   Mon, 26 Aug 2019 15:00:53 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     pasha.tatashin@...een.com, jmorris@...ei.org, sashal@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, marc.zyngier@....com,
        james.morse@....com, vladimir.murzin@....com, mark.rutland@....com
Subject: [PATCH v1 3/6] rqchip/gic-v3-its: add reset pending table function

Add function that is similar to gic_reset_prop_table but for pending
table.

Signed-off-by: Pavel Tatashin <pasha.tatashin@...een.com>
---
 drivers/irqchip/irq-gic-v3-its.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 656b6c6e1bf8..124e2cb890cd 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1989,17 +1989,23 @@ static int its_alloc_collections(struct its_node *its)
 	return 0;
 }
 
+static void gic_reset_pending_table(void *va)
+{
+	memset(va, 0, LPI_PENDBASE_SZ);
+
+	/* Make sure the GIC will observe the zero-ed page */
+	gic_flush_dcache_to_poc(va, LPI_PENDBASE_SZ);
+}
+
 static struct page *its_allocate_pending_table(gfp_t gfp_flags)
 {
 	struct page *pend_page;
 
-	pend_page = alloc_pages(gfp_flags | __GFP_ZERO,
-				get_order(LPI_PENDBASE_SZ));
+	pend_page = alloc_pages(gfp_flags, get_order(LPI_PENDBASE_SZ));
 	if (!pend_page)
 		return NULL;
 
-	/* Make sure the GIC will observe the zero-ed page */
-	gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ);
+	gic_reset_pending_table(page_address(pend_page));
 
 	return pend_page;
 }
-- 
2.23.0