linux-kernel - [PATCH 4/4] powerpc/mpic: remove unused functions

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Date:	Tue, 24 Feb 2015 16:05:06 +0700
From:	Arseny Solokha <asolokha@...kras.ru>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Scott Wood <scottwood@...escale.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Arseny Solokha <asolokha@...kras.ru>, hongtao.jia@...escale.com
Subject: [PATCH 4/4] powerpc/mpic: remove unused functions

Drop unused fsl_mpic_primary_get_version(), mpic_set_clk_ratio(),
mpic_set_serial_int().

  + fsl_mpic_primary_get_version() is just a safe wrapper around
fsl_mpic_get_version() for SMP configurations. While the latter is
called explicitly for handling PIC initialization and setting up error
interrupt vector depending on PIC hardware version, the former isn't
used for anything.

  + As for mpic_set_clk_ratio() and mpic_set_serial_int(), they both are
almost nine years old[1] but still have no chance to be called even from
out-of-tree modules because they both are __init and of course aren't
exported.

[1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2006-June/023867.html

Signed-off-by: Arseny Solokha <asolokha@...kras.ru>
Cc: hongtao.jia@...escale.com
---
 arch/powerpc/include/asm/mpic.h | 20 --------------------
 arch/powerpc/sysdev/mpic.c      | 35 -----------------------------------
 2 files changed, 55 deletions(-)

diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index 754f93d..6ce63a7 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -34,10 +34,6 @@
 #define		MPIC_GREG_GCONF_BASE_MASK		0x000fffff
 #define		MPIC_GREG_GCONF_MCK			0x08000000
 #define MPIC_GREG_GLOBAL_CONF_1		0x00030
-#define		MPIC_GREG_GLOBAL_CONF_1_SIE		0x08000000
-#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK	0x70000000
-#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(r)	\
-			(((r) << 28) & MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK)
 #define MPIC_GREG_VENDOR_0		0x00040
 #define MPIC_GREG_VENDOR_1		0x00050
 #define MPIC_GREG_VENDOR_2		0x00060
@@ -395,16 +391,6 @@ extern struct bus_type mpic_subsys;
 #define	MPIC_REGSET_STANDARD		MPIC_REGSET(0)	/* Original MPIC */
 #define	MPIC_REGSET_TSI108		MPIC_REGSET(1)	/* Tsi108/109 PIC */
 
-/* Get the version of primary MPIC */
-#ifdef CONFIG_MPIC
-extern u32 fsl_mpic_primary_get_version(void);
-#else
-static inline u32 fsl_mpic_primary_get_version(void)
-{
-	return 0;
-}
-#endif
-
 /* Allocate the controller structure and setup the linux irq descs
  * for the range if interrupts passed in. No HW initialization is
  * actually performed.
@@ -496,11 +482,5 @@ extern unsigned int mpic_get_coreint_irq(void);
 /* Fetch Machine Check interrupt from primary mpic */
 extern unsigned int mpic_get_mcirq(void);
 
-/* Set the EPIC clock ratio */
-void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio);
-
-/* Enable/Disable EPIC serial interrupt mode */
-void mpic_set_serial_int(struct mpic *mpic, int enable);
-
 #endif /* __KERNEL__ */
 #endif	/* _ASM_POWERPC_MPIC_H */
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index bbfbbf2..f72b592 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1219,16 +1219,6 @@ static u32 fsl_mpic_get_version(struct mpic *mpic)
  * Exported functions
  */
 
-u32 fsl_mpic_primary_get_version(void)
-{
-	struct mpic *mpic = mpic_primary;
-
-	if (mpic)
-		return fsl_mpic_get_version(mpic);
-
-	return 0;
-}
-
 struct mpic * __init mpic_alloc(struct device_node *node,
 				phys_addr_t phys_addr,
 				unsigned int flags,
@@ -1676,31 +1666,6 @@ void __init mpic_init(struct mpic *mpic)
 		mpic_err_int_init(mpic, MPIC_FSL_ERR_INT);
 }
 
-void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio)
-{
-	u32 v;
-
-	v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
-	v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK;
-	v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio);
-	mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
-}
-
-void __init mpic_set_serial_int(struct mpic *mpic, int enable)
-{
-	unsigned long flags;
-	u32 v;
-
-	raw_spin_lock_irqsave(&mpic_lock, flags);
-	v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
-	if (enable)
-		v |= MPIC_GREG_GLOBAL_CONF_1_SIE;
-	else
-		v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;
-	mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
-	raw_spin_unlock_irqrestore(&mpic_lock, flags);
-}
-
 void mpic_irq_set_priority(unsigned int irq, unsigned int pri)
 {
 	struct mpic *mpic = mpic_find(irq);
-- 
2.3.0

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