add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/s390/include/asm/archrandom.h
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..
@@ -2,7 +2,7 @@
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 /*
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  * Kernel interface for the s390 arch_random_* functions
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  *
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- * Copyright IBM Corp. 2017
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+ * Copyright IBM Corp. 2017, 2022
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  *
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  * Author: Harald Freudenberger <freude@de.ibm.com>
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  *
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@@ -14,47 +14,41 @@
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 #ifdef CONFIG_ARCH_RANDOM
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 #include <linux/static_key.h>
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+#include <linux/preempt.h>
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 #include <linux/atomic.h>
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+#include <asm/cpacf.h>
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 DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
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 extern atomic64_t s390_arch_random_counter;
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-bool s390_arch_random_generate(u8 *buf, unsigned int nbytes);
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-
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-static inline bool arch_has_random(void)
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+static inline bool __must_check arch_get_random_long(unsigned long *v)
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 {
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 	return false;
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 }
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-static inline bool arch_has_random_seed(void)
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+static inline bool __must_check arch_get_random_int(unsigned int *v)
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 {
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-	if (static_branch_likely(&s390_arch_random_available))
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+	return false;
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+}
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+
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+static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
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+{
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+	if (static_branch_likely(&s390_arch_random_available) &&
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+	    in_task()) {
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+		cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v));
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+		atomic64_add(sizeof(*v), &s390_arch_random_counter);
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 		return true;
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-	return false;
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-}
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-
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-static inline bool arch_get_random_long(unsigned long *v)
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-{
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-	return false;
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-}
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-
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-static inline bool arch_get_random_int(unsigned int *v)
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-{
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-	return false;
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-}
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-
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-static inline bool arch_get_random_seed_long(unsigned long *v)
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-{
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-	if (static_branch_likely(&s390_arch_random_available)) {
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-		return s390_arch_random_generate((u8 *)v, sizeof(*v));
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 	}
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 	return false;
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 }
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-static inline bool arch_get_random_seed_int(unsigned int *v)
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+static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
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 {
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-	if (static_branch_likely(&s390_arch_random_available)) {
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-		return s390_arch_random_generate((u8 *)v, sizeof(*v));
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+	if (static_branch_likely(&s390_arch_random_available) &&
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+	    in_task()) {
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+		cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v));
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+		atomic64_add(sizeof(*v), &s390_arch_random_counter);
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+		return true;
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 	}
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 	return false;
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 }