linux-kernel - [PATCH 5.15 108/145] powerpc: define get

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Date:   Fri, 27 May 2022 10:50:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Herrenschmidt <benh@...abs.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH 5.15 108/145] powerpc: define get_cycles macro for arch-override

From: "Jason A. Donenfeld" <Jason@...c4.com>

commit 408835832158df0357e18e96da7f2d1ed6b80e7f upstream.

PowerPC defines a get_cycles() function, but it does not do the usual
`#define get_cycles get_cycles` dance, making it impossible for generic
code to see if an arch-specific function was defined. While the
get_cycles() ifdef is not currently used, the following timekeeping
patch in this series will depend on the macro existing (or not existing)
when defining random_get_entropy().

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Benjamin Herrenschmidt <benh@...abs.org>
Cc: Paul Mackerras <paulus@...ba.org>
Acked-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/powerpc/include/asm/timex.h |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/powerpc/include/asm/timex.h
+++ b/arch/powerpc/include/asm/timex.h
@@ -19,6 +19,7 @@ static inline cycles_t get_cycles(void)
 {
 	return mftb();
 }
+#define get_cycles get_cycles
 
 #endif	/* __KERNEL__ */
 #endif	/* _ASM_POWERPC_TIMEX_H */