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58 lines
1.4 KiB
58 lines
1.4 KiB
4 years ago
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From 7039d1f8200b9599b23db5953934fdb43b0442e0 Mon Sep 17 00:00:00 2001
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From: Jes Sorensen <jsorensen@fb.com>
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Date: Tue, 9 Jul 2019 14:15:38 -0400
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Subject: [RHEL7.8 PATCH V2 28/47] mdadm.h: Introduced unaligned
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{get,put}_unaligned{16,32}()
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We need these to avoid gcc9 going all crazy on us.
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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mdadm.h | 30 ++++++++++++++++++++++++++++++
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1 file changed, 30 insertions(+)
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diff --git a/mdadm.h b/mdadm.h
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index 427cc52..0fa9e1b 100644
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--- a/mdadm.h
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+++ b/mdadm.h
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@@ -192,6 +192,36 @@ struct dlm_lksb {
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#endif /* __KLIBC__ */
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/*
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+ * Partially stolen from include/linux/unaligned/packed_struct.h
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+ */
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+struct __una_u16 { __u16 x; } __attribute__ ((packed));
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+struct __una_u32 { __u32 x; } __attribute__ ((packed));
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+
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+static inline __u16 __get_unaligned16(const void *p)
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+{
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+ const struct __una_u16 *ptr = (const struct __una_u16 *)p;
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+ return ptr->x;
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+}
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+
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+static inline __u32 __get_unaligned32(const void *p)
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+{
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+ const struct __una_u32 *ptr = (const struct __una_u32 *)p;
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+ return ptr->x;
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+}
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+
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+static inline void __put_unaligned16(__u16 val, void *p)
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+{
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+ struct __una_u16 *ptr = (struct __una_u16 *)p;
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+ ptr->x = val;
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+}
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+
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+static inline void __put_unaligned32(__u32 val, void *p)
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+{
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+ struct __una_u32 *ptr = (struct __una_u32 *)p;
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+ ptr->x = val;
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+}
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+
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+/*
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* Check at compile time that something is of a particular type.
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* Always evaluates to 1 so you may use it easily in comparisons.
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*/
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--
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2.7.5
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