linux-kernel - [PATCH 1/5] perf tools: Add get_unaligned

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Date:   Thu,  5 Oct 2023 22:04:47 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 1/5] perf tools: Add get_unaligned_leNN()

Add get_unaligned_le16(), get_unaligned_le32 and get_unaligned_le64, same
as include/asm-generic/unaligned.h.

Use diagnostic pragmas to ignore -Wpacked used by perf build.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/include/asm-generic/unaligned.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tools/include/asm-generic/unaligned.h b/tools/include/asm-generic/unaligned.h
index 47387c607035..9140bb4e16c6 100644
--- a/tools/include/asm-generic/unaligned.h
+++ b/tools/include/asm-generic/unaligned.h
@@ -6,6 +6,9 @@
 #ifndef __TOOLS_LINUX_ASM_GENERIC_UNALIGNED_H
 #define __TOOLS_LINUX_ASM_GENERIC_UNALIGNED_H
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpacked"
+
 #define __get_unaligned_t(type, ptr) ({						\
 	const struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr);	\
 	__pptr->x;								\
@@ -19,5 +22,22 @@
 #define get_unaligned(ptr)	__get_unaligned_t(typeof(*(ptr)), (ptr))
 #define put_unaligned(val, ptr) __put_unaligned_t(typeof(*(ptr)), (val), (ptr))
 
+static inline u16 get_unaligned_le16(const void *p)
+{
+	return le16_to_cpu(__get_unaligned_t(__le16, p));
+}
+
+static inline u32 get_unaligned_le32(const void *p)
+{
+	return le32_to_cpu(__get_unaligned_t(__le32, p));
+}
+
+static inline u64 get_unaligned_le64(const void *p)
+{
+	return le64_to_cpu(__get_unaligned_t(__le64, p));
+}
+
+#pragma GCC diagnostic pop
+
 #endif /* __TOOLS_LINUX_ASM_GENERIC_UNALIGNED_H */
 
-- 
2.34.1