ARM: 9386/2: mm: Use symbol alias for cache functions

Linus Walleij · Russell King (Oracle) · commit 2074beebacfc · 2024-04-29T14:14:17.000+01:00
The cache functions to flush user cache (*_flush_user_cache_all)
are in many cases just a branch to the corresponfing userspace or
kernelspace function. These functions also have the same arguments.

Simplify these by using SYM_FUNC_ALIAS() in all affected sites.

The NOP cache has very many similar calls which are just returns,
but it would be confusing to use aliases here, so leave all the
explicit returns and drop a comment on why we are not using aliases.

Reviewed-by: Sami Tolvanen &lt;samitolvanen@google.com&gt;
Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Signed-off-by: Russell King (Oracle) &lt;rmk+kernel@armlinux.org.uk&gt;
diff --git a/arch/arm/mm/cache-fa.S b/arch/arm/mm/cache-fa.S
@@ -52,9 +52,7 @@ SYM_FUNC_END(fa_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(fa_flush_user_cache_all)
-	b	fa_flush_kern_cache_all
-SYM_FUNC_END(fa_flush_user_cache_all)
+SYM_FUNC_ALIAS(fa_flush_user_cache_all, fa_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/cache-nop.S b/arch/arm/mm/cache-nop.S
@@ -6,6 +6,10 @@
 
 #include "proc-macros.S"
 
+/*
+ * These are all open-coded instead of aliased, to make clear
+ * what is going on here: all functions are stubbed out.
+ */
 SYM_TYPED_FUNC_START(nop_flush_icache_all)
 	ret	lr
 SYM_FUNC_END(nop_flush_icache_all)
diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S
@@ -28,9 +28,7 @@ SYM_FUNC_END(v4_flush_icache_all)
  *
  *	- mm	- mm_struct describing address space
  */
-SYM_TYPED_FUNC_START(v4_flush_user_cache_all)
-	b	v4_flush_kern_cache_all
-SYM_FUNC_END(v4_flush_user_cache_all)
+SYM_FUNC_ALIAS(v4_flush_user_cache_all, v4_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
@@ -66,9 +66,7 @@ SYM_FUNC_END(v4wb_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(v4wb_flush_user_cache_all)
-	b	v4wb_flush_kern_cache_all
-SYM_FUNC_END(v4wb_flush_user_cache_all)
+SYM_FUNC_ALIAS(v4wb_flush_user_cache_all, v4wb_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/cache-v4wt.S b/arch/arm/mm/cache-v4wt.S
@@ -56,9 +56,7 @@ SYM_FUNC_END(v4wt_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(v4wt_flush_user_cache_all)
-	b	v4wt_flush_kern_cache_all
-SYM_FUNC_END(v4wt_flush_user_cache_all)
+SYM_FUNC_ALIAS(v4wt_flush_user_cache_all, v4wt_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
@@ -127,9 +127,7 @@ SYM_FUNC_END(arm1020_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(arm1020_flush_user_cache_all)
-	b	arm1020_flush_kern_cache_all
-SYM_FUNC_END(arm1020_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm1020_flush_user_cache_all, arm1020_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
@@ -127,9 +127,7 @@ SYM_FUNC_END(arm1020e_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(arm1020e_flush_user_cache_all)
-	b	arm1020e_flush_kern_cache_all
-SYM_FUNC_END(arm1020e_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm1020e_flush_user_cache_all, arm1020e_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
@@ -127,9 +127,7 @@ SYM_FUNC_END(arm1022_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(arm1022_flush_user_cache_all)
-	b	arm1022_flush_kern_cache_all
-SYM_FUNC_END(arm1022_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm1022_flush_user_cache_all, arm1022_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
@@ -127,9 +127,7 @@ SYM_FUNC_END(arm1026_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(arm1026_flush_user_cache_all)
-	b	arm1026_flush_kern_cache_all
-SYM_FUNC_END(arm1026_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm1026_flush_user_cache_all, arm1026_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
@@ -116,9 +116,7 @@ SYM_FUNC_END(arm920_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(arm920_flush_user_cache_all)
-	b	arm920_flush_kern_cache_all
-SYM_FUNC_END(arm920_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm920_flush_user_cache_all, arm920_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
@@ -118,9 +118,7 @@ SYM_FUNC_END(arm922_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular
  *	address space.
  */
-SYM_TYPED_FUNC_START(arm922_flush_user_cache_all)
-	b	arm922_flush_kern_cache_all
-SYM_FUNC_END(arm922_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm922_flush_user_cache_all, arm922_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
@@ -151,9 +151,7 @@ SYM_FUNC_END(arm925_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular
  *	address space.
  */
-SYM_TYPED_FUNC_START(arm925_flush_user_cache_all)
-	b	arm925_flush_kern_cache_all
-SYM_FUNC_END(arm925_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm925_flush_user_cache_all, arm925_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
@@ -117,9 +117,7 @@ SYM_FUNC_END(arm926_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular
  *	address space.
  */
-SYM_TYPED_FUNC_START(arm926_flush_user_cache_all)
-	b	arm926_flush_kern_cache_all
-SYM_FUNC_END(arm926_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm926_flush_user_cache_all, arm926_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm940.S b/arch/arm/mm/proc-arm940.S
@@ -81,9 +81,7 @@ SYM_FUNC_END(arm940_flush_icache_all)
 /*
  *	flush_user_cache_all()
  */
-SYM_TYPED_FUNC_START(arm940_flush_user_cache_all)
-	b	arm940_flush_kern_cache_all
-SYM_FUNC_END(arm940_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm940_flush_user_cache_all, arm940_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S
@@ -88,9 +88,7 @@ SYM_FUNC_END(arm946_flush_icache_all)
 /*
  *	flush_user_cache_all()
  */
-SYM_TYPED_FUNC_START(arm946_flush_user_cache_all)
-	b	arm946_flush_kern_cache_all
-SYM_FUNC_END(arm946_flush_user_cache_all)
+SYM_FUNC_ALIAS(arm946_flush_user_cache_all, arm946_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
@@ -136,9 +136,7 @@ SYM_FUNC_END(feroceon_flush_icache_all)
  *	address space.
  */
 	.align	5
-SYM_TYPED_FUNC_START(feroceon_flush_user_cache_all)
-	b	feroceon_flush_kern_cache_all
-SYM_FUNC_END(feroceon_flush_user_cache_all)
+SYM_FUNC_ALIAS(feroceon_flush_user_cache_all, feroceon_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-mohawk.S b/arch/arm/mm/proc-mohawk.S
@@ -100,9 +100,7 @@ SYM_FUNC_END(mohawk_flush_icache_all)
  *	Clean and invalidate all cache entries in a particular
  *	address space.
  */
-SYM_TYPED_FUNC_START(mohawk_flush_user_cache_all)
-	b	mohawk_flush_kern_cache_all
-SYM_FUNC_END(mohawk_flush_user_cache_all)
+SYM_FUNC_ALIAS(mohawk_flush_user_cache_all, mohawk_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
@@ -157,9 +157,7 @@ SYM_FUNC_END(xsc3_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(xsc3_flush_user_cache_all)
-	b	xsc3_flush_kern_cache_all
-SYM_FUNC_END(xsc3_flush_user_cache_all)
+SYM_FUNC_ALIAS(xsc3_flush_user_cache_all, xsc3_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
@@ -199,9 +199,7 @@ SYM_FUNC_END(xscale_flush_icache_all)
  *	Invalidate all cache entries in a particular address
  *	space.
  */
-SYM_TYPED_FUNC_START(xscale_flush_user_cache_all)
-	b	xscale_flush_kern_cache_all
-SYM_FUNC_END(xscale_flush_user_cache_all)
+SYM_FUNC_ALIAS(xscale_flush_user_cache_all, xscale_flush_kern_cache_all)
 
 /*
  *	flush_kern_cache_all()
