[PATCH]: ata: fix unused variable warning in sil_host_intr()

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Warning seen with 'make -j24 CONFIG_DEBUG_SECTION_MISMATCH=y':

drivers/ata/sata_sil.c: In function â??sil_host_intrâ??:
drivers/ata/sata_sil.c:442: error: â??serrorâ?? may be used uninitialized in this function

Signed-off-by: Prarit Bhargava <prarit@xxxxxxxxxx>

diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 3cb69d5..d7c616c 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -439,7 +439,7 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 	u8 status;
 
 	if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
-		u32 serror;
+		u32 uninitialized_var(serror);
 
 		/* SIEN doesn't mask SATA IRQs on some 3112s.  Those
 		 * controllers continue to assert IRQ as long as

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