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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

 kernel/arch/s390/hypfs/hypfs_diag0c.c
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@@ -16,26 +16,12 @@
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 #define DBFS_D0C_HDR_VERSION 0
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 /*
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- * Execute diagnose 0c in 31 bit mode
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- */
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-static void diag0c(struct hypfs_diag0c_entry *entry)
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-{
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-	diag_stat_inc(DIAG_STAT_X00C);
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-	asm volatile (
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-		"	sam31\n"
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-		"	diag	%0,%0,0x0c\n"
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-		"	sam64\n"
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-		: /* no output register */
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-		: "a" (entry)
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-		: "memory");
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-}
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-
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-/*
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  * Get hypfs_diag0c_entry from CPU vector and store diag0c data
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  */
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 static void diag0c_fn(void *data)
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 {
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-	diag0c(((void **) data)[smp_processor_id()]);
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+	diag_stat_inc(DIAG_STAT_X00C);
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+	diag_dma_ops.diag0c(((void **) data)[smp_processor_id()]);
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 }
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 /*
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@@ -54,8 +40,7 @@
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 	if (!cpu_vec)
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 		goto fail_put_online_cpus;
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 	/* Note: Diag 0c needs 8 byte alignment and real storage */
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-	diag0c_data = kzalloc(sizeof(struct hypfs_diag0c_hdr) +
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-			      cpu_count * sizeof(struct hypfs_diag0c_entry),
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+	diag0c_data = kzalloc(struct_size(diag0c_data, entry, cpu_count),
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 			      GFP_KERNEL | GFP_DMA);
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 	if (!diag0c_data)
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 		goto fail_kfree_cpu_vec;
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@@ -125,7 +110,8 @@
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 {
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 	if (!MACHINE_IS_VM)
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 		return 0;
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-	return hypfs_dbfs_create_file(&dbfs_file_0c);
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+	hypfs_dbfs_create_file(&dbfs_file_0c);
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+	return 0;
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 }
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 /*