linux-kernel - [PATCH 2/2] dmaengine: ppc4xx: remove xor_hw

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Date:   Mon, 19 Oct 2020 17:57:56 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH 2/2] dmaengine: ppc4xx: remove xor_hw_desc assignment without reading

The xor_hw_desc local variable is assigned but never read:

    drivers/dma/ppc4xx/adma.c: In function ‘ppc440spe_desc_set_src_mult’:
    drivers/dma/ppc4xx/adma.c:562:17: warning: variable ‘xor_hw_desc’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
 drivers/dma/ppc4xx/adma.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index fea598550582..df7704053d91 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -559,7 +559,6 @@ static void ppc440spe_desc_set_src_mult(struct ppc440spe_adma_desc_slot *desc,
 			int sg_index, unsigned char mult_value)
 {
 	struct dma_cdb *dma_hw_desc;
-	struct xor_cb *xor_hw_desc;
 	u32 *psgu;
 
 	switch (chan->device->id) {
@@ -590,7 +589,6 @@ static void ppc440spe_desc_set_src_mult(struct ppc440spe_adma_desc_slot *desc,
 		*psgu |= cpu_to_le32(mult_value << mult_index);
 		break;
 	case PPC440SPE_XOR_ID:
-		xor_hw_desc = desc->hw_desc;
 		break;
 	default:
 		BUG();
-- 
2.25.1