2024-02-23 19:37:24

by Sam Ravnborg via B4 Relay

Subject: [PATCH 1/6] sparc32: Use generic cmpdi2/ucmpdi2 variants

From: Sam Ravnborg <[email protected]>

Use the generic variants - the implementation is the same.
As a nice side-effect fix the following warnings:

cmpdi2.c: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes]
ucmpdi2.c: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]

Signed-off-by: Sam Ravnborg <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Andreas Larsson <[email protected]>
---
arch/sparc/Kconfig | 2 ++
arch/sparc/lib/Makefile | 4 ++--
arch/sparc/lib/cmpdi2.c | 28 ----------------------------
arch/sparc/lib/ucmpdi2.c | 20 --------------------
4 files changed, 4 insertions(+), 50 deletions(-)

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index b087d4fe00af..734f23daecca 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -57,6 +57,8 @@ config SPARC32
select CLZ_TAB
select DMA_DIRECT_REMAP
select GENERIC_ATOMIC64
+ select GENERIC_LIB_CMPDI2
+ select GENERIC_LIB_UCMPDI2
select HAVE_UID16
select LOCK_MM_AND_FIND_VMA
select OLD_SIGACTION
diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile
index 59669ebddd4e..ee5091dd67ed 100644
--- a/arch/sparc/lib/Makefile
+++ b/arch/sparc/lib/Makefile
@@ -14,7 +14,7 @@ lib-$(CONFIG_SPARC32) += divdi3.o udivdi3.o
lib-$(CONFIG_SPARC32) += copy_user.o locks.o
lib-$(CONFIG_SPARC64) += atomic_64.o
lib-$(CONFIG_SPARC32) += lshrdi3.o ashldi3.o
-lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o
+lib-$(CONFIG_SPARC32) += muldi3.o bitext.o
lib-$(CONFIG_SPARC64) += multi3.o
lib-$(CONFIG_SPARC64) += fls.o
lib-$(CONFIG_SPARC64) += fls64.o
@@ -51,5 +51,5 @@ lib-$(CONFIG_SPARC64) += copy_in_user.o memmove.o
lib-$(CONFIG_SPARC64) += mcount.o ipcsum.o xor.o hweight.o ffs.o

obj-$(CONFIG_SPARC64) += iomap.o
-obj-$(CONFIG_SPARC32) += atomic32.o ucmpdi2.o
+obj-$(CONFIG_SPARC32) += atomic32.o
obj-$(CONFIG_SPARC64) += PeeCeeI.o
diff --git a/arch/sparc/lib/cmpdi2.c b/arch/sparc/lib/cmpdi2.c
deleted file mode 100644
index 333367fe7353..000000000000
--- a/arch/sparc/lib/cmpdi2.c
+++ /dev/null
@@ -1,28 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/module.h>
-
-#include "libgcc.h"
-
-word_type __cmpdi2(long long a, long long b)
-{
- const DWunion au = {
- .ll = a
- };
- const DWunion bu = {
- .ll = b
- };
-
- if (au.s.high < bu.s.high)
- return 0;
- else if (au.s.high > bu.s.high)
- return 2;
-
- if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
- return 0;
- else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
- return 2;
-
- return 1;
-}
-
-EXPORT_SYMBOL(__cmpdi2);
diff --git a/arch/sparc/lib/ucmpdi2.c b/arch/sparc/lib/ucmpdi2.c
deleted file mode 100644
index 82c1cccb1264..000000000000
--- a/arch/sparc/lib/ucmpdi2.c
+++ /dev/null
@@ -1,20 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/module.h>
-#include "libgcc.h"
-
-word_type __ucmpdi2(unsigned long long a, unsigned long long b)
-{
- const DWunion au = {.ll = a};
- const DWunion bu = {.ll = b};
-
- if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
- return 0;
- else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
- return 2;
- if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
- return 0;
- else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
- return 2;
- return 1;
-}
-EXPORT_SYMBOL(__ucmpdi2);

--
2.34.1

2024-02-24 00:28:17

by Randy Dunlap

Subject: Re: [PATCH 1/6] sparc32: Use generic cmpdi2/ucmpdi2 variants

On 2/23/24 11:36, Sam Ravnborg via B4 Relay wrote:
> From: Sam Ravnborg <[email protected]>
>
> Use the generic variants - the implementation is the same.
> As a nice side-effect fix the following warnings:
>
> cmpdi2.c: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes]
> ucmpdi2.c: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]
>
> Signed-off-by: Sam Ravnborg <[email protected]>
> Cc: "David S. Miller" <[email protected]>
> Cc: Andreas Larsson <[email protected]>

Looks good. Thanks.

Reviewed-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]> # build-tested

> ---
> arch/sparc/Kconfig | 2 ++
> arch/sparc/lib/Makefile | 4 ++--
> arch/sparc/lib/cmpdi2.c | 28 ----------------------------
> arch/sparc/lib/ucmpdi2.c | 20 --------------------
> 4 files changed, 4 insertions(+), 50 deletions(-)
>

--
#Randy

2024-02-24 02:59:54

by Maciej W. Rozycki

Subject: Re: [PATCH 1/6] sparc32: Use generic cmpdi2/ucmpdi2 variants

On Fri, 23 Feb 2024, Sam Ravnborg via B4 Relay wrote:

> Use the generic variants - the implementation is the same.
> As a nice side-effect fix the following warnings:
>
> cmpdi2.c: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes]
> ucmpdi2.c: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]
>
> Signed-off-by: Sam Ravnborg <[email protected]>
> Cc: "David S. Miller" <[email protected]>
> Cc: Andreas Larsson <[email protected]>
> ---

LGTM. You may wish to add:

Fixes: 0fcb70851fbf ("Makefile.extrawarn: turn on missing-prototypes globally")

but otherwise:

Reviewed-by: Maciej W. Rozycki <[email protected]>
Tested-by: Maciej W. Rozycki <[email protected]> # build-tested

Maciej