add driver 5G

hc

2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2

 kernel/arch/powerpc/platforms/pseries/iommu.c
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@@ -24,7 +24,6 @@
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 #include <linux/of.h>
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 #include <linux/iommu.h>
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 #include <linux/rculist.h>
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-#include <linux/local_lock.h>
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 #include <asm/io.h>
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 #include <asm/prom.h>
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 #include <asm/rtas.h>
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@@ -191,13 +190,7 @@
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 	return ret;
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 }
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-struct tce_page {
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-	__be64 * page;
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-	local_lock_t lock;
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-};
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-static DEFINE_PER_CPU(struct tce_page, tce_page) = {
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-	.lock = INIT_LOCAL_LOCK(lock),
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-};
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+static DEFINE_PER_CPU(__be64 *, tce_page);
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 static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
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 				     long npages, unsigned long uaddr,
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@@ -219,10 +212,9 @@
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 		                           direction, attrs);
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 	}
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-	/* to protect tcep and the page behind it */
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-	local_lock_irqsave(&tce_page.lock, flags);
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+	local_irq_save(flags);	/* to protect tcep and the page behind it */
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-	tcep = __this_cpu_read(tce_page.page);
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+	tcep = __this_cpu_read(tce_page);
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 	/* This is safe to do since interrupts are off when we're called
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 	 * from iommu_alloc{,_sg}()
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@@ -231,12 +223,12 @@
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 		tcep = (__be64 *)__get_free_page(GFP_ATOMIC);
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 		/* If allocation fails, fall back to the loop implementation */
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 		if (!tcep) {
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-			local_unlock_irqrestore(&tce_page.lock, flags);
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+			local_irq_restore(flags);
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 			return tce_build_pSeriesLP(tbl->it_index, tcenum,
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 					tbl->it_page_shift,
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 					npages, uaddr, direction, attrs);
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 		}
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-		__this_cpu_write(tce_page.page, tcep);
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+		__this_cpu_write(tce_page, tcep);
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 	}
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 	rpn = __pa(uaddr) >> TCE_SHIFT;
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@@ -266,7 +258,7 @@
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 		tcenum += limit;
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 	} while (npages > 0 && !rc);
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-	local_unlock_irqrestore(&tce_page.lock, flags);
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+	local_irq_restore(flags);
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 	if (unlikely(rc == H_NOT_ENOUGH_RESOURCES)) {
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 		ret = (int)rc;
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@@ -437,17 +429,16 @@
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 				DMA_BIDIRECTIONAL, 0);
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 	}
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-	/* to protect tcep and the page behind it */
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-	local_lock_irq(&tce_page.lock);
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-	tcep = __this_cpu_read(tce_page.page);
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+	local_irq_disable();	/* to protect tcep and the page behind it */
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+	tcep = __this_cpu_read(tce_page);
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 	if (!tcep) {
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 		tcep = (__be64 *)__get_free_page(GFP_ATOMIC);
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 		if (!tcep) {
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-			local_unlock_irq(&tce_page.lock);
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+			local_irq_enable();
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 			return -ENOMEM;
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 		}
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-		__this_cpu_write(tce_page.page, tcep);
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+		__this_cpu_write(tce_page, tcep);
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 	}
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 	proto_tce = TCE_PCI_READ | TCE_PCI_WRITE;
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@@ -490,7 +481,7 @@
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 	/* error cleanup: caller will clear whole range */
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-	local_unlock_irq(&tce_page.lock);
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+	local_irq_enable();
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 	return rc;
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 }
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