The patch titled
Subject: alpha: add support for memset16
has been added to the -mm tree. Its filename is
alpha-add-support-for-memset16.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/alpha-add-support-for-memset16.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/alpha-add-support-for-memset16.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Subject: alpha: add support for memset16
Alpha already had an optimised fill-memory-with-16-bit-quantity assembler
routine called memsetw(). It has a slightly different calling convention
from memset16() in that it takes a byte count, not a count of words.
That's the same convention used by ARM's __memset routines, so rename
Alpha's routine to match and add a memset16() wrapper around it. Then
convert Alpha's scr_memsetw() to call memset16() instead of memsetw().
Link: http://lkml.kernel.org/r/20170720184539.31609-6-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxxxx>
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/alpha/include/asm/string.h | 15 ++++++++-------
arch/alpha/include/asm/vga.h | 2 +-
arch/alpha/lib/memset.S | 10 +++++-----
3 files changed, 14 insertions(+), 13 deletions(-)
diff -puN arch/alpha/include/asm/string.h~alpha-add-support-for-memset16 arch/alpha/include/asm/string.h
--- a/arch/alpha/include/asm/string.h~alpha-add-support-for-memset16
+++ a/arch/alpha/include/asm/string.h
@@ -65,13 +65,14 @@ extern void * memchr(const void *, int,
aligned values. The DEST and COUNT parameters must be even for
correct operation. */
-#define __HAVE_ARCH_MEMSETW
-extern void * __memsetw(void *dest, unsigned short, size_t count);
-
-#define memsetw(s, c, n) \
-(__builtin_constant_p(c) \
- ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
- : __memsetw((s),(c),(n)))
+#define __HAVE_ARCH_MEMSET16
+extern void * __memset16(void *dest, unsigned short, size_t count);
+static inline void *memset16(uint16_t *p, uint16_t v, size_t n)
+{
+ if (__builtin_constant_p(v))
+ return __constant_c_memset(p, 0x0001000100010001UL * v, n * 2);
+ return __memset16(p, v, n * 2);
+}
#endif /* __KERNEL__ */
diff -puN arch/alpha/include/asm/vga.h~alpha-add-support-for-memset16 arch/alpha/include/asm/vga.h
--- a/arch/alpha/include/asm/vga.h~alpha-add-support-for-memset16
+++ a/arch/alpha/include/asm/vga.h
@@ -34,7 +34,7 @@ static inline void scr_memsetw(u16 *s, u
if (__is_ioaddr(s))
memsetw_io((u16 __iomem *) s, c, count);
else
- memsetw(s, c, count);
+ memset16(s, c, count / 2);
}
/* Do not trust that the usage will be correct; analyze the arguments. */
diff -puN arch/alpha/lib/memset.S~alpha-add-support-for-memset16 arch/alpha/lib/memset.S
--- a/arch/alpha/lib/memset.S~alpha-add-support-for-memset16
+++ a/arch/alpha/lib/memset.S
@@ -20,7 +20,7 @@
.globl memset
.globl __memset
.globl ___memset
- .globl __memsetw
+ .globl __memset16
.globl __constant_c_memset
.ent ___memset
@@ -110,8 +110,8 @@ EXPORT_SYMBOL(___memset)
EXPORT_SYMBOL(__constant_c_memset)
.align 5
- .ent __memsetw
-__memsetw:
+ .ent __memset16
+__memset16:
.prologue 0
inswl $17,0,$1 /* E0 */
@@ -123,8 +123,8 @@ __memsetw:
or $1,$4,$17 /* E0 */
br __constant_c_memset /* .. E1 */
- .end __memsetw
-EXPORT_SYMBOL(__memsetw)
+ .end __memset16
+EXPORT_SYMBOL(__memset16)
memset = ___memset
__memset = ___memset
_
Patches currently in -mm which might be from mawilcox@xxxxxxxxxxxxx are
add-multibyte-memset-functions.patch
add-testcases-for-memset16-32-64.patch
x86-implement-memset16-memset32-memset64.patch
arm-implement-memset32-memset64.patch
alpha-add-support-for-memset16.patch
zram-convert-to-using-memset_l.patch
sym53c8xx_2-convert-to-use-memset32.patch
vga-optimise-console-scrolling.patch
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