diff options
| author | Matthew Wilcox <mawilcox@microsoft.com> | 2017-09-08 16:14:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:48 -0700 |
| commit | ac036f9570a2d318b7d8dbbdbf0e269d7cc68cef (patch) | |
| tree | fe4b5aa299c97e2b496d6b1a9e0fe93f1e7b3f22 /arch/mips | |
| parent | 1caffba9db4aa27c3e7ebc05668afca1f991ab8d (diff) | |
vga: optimise console scrolling
Where possible, call memset16(), memmove() or memcpy() instead of using
open-coded loops. I don't like the calling convention that uses a byte
count instead of a count of u16s, but it's a little late to change that.
Reduces code size of fbcon.o by almost 400 bytes on my laptop build.
[akpm@linux-foundation.org: fix build]
Link: http://lkml.kernel.org/r/20170720184539.31609-9-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/vga.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/mips/include/asm/vga.h b/arch/mips/include/asm/vga.h index f82c83749a08..975ff51f80c4 100644 --- a/arch/mips/include/asm/vga.h +++ b/arch/mips/include/asm/vga.h @@ -6,6 +6,7 @@ #ifndef _ASM_VGA_H #define _ASM_VGA_H +#include <linux/string.h> #include <asm/addrspace.h> #include <asm/byteorder.h> @@ -40,9 +41,15 @@ static inline u16 scr_readw(volatile const u16 *addr) return le16_to_cpu(*addr); } +static inline void scr_memsetw(u16 *s, u16 v, unsigned int count) +{ + memset16(s, cpu_to_le16(v), count / 2); +} + #define scr_memcpyw(d, s, c) memcpy(d, s, c) #define scr_memmovew(d, s, c) memmove(d, s, c) #define VT_BUF_HAVE_MEMCPYW #define VT_BUF_HAVE_MEMMOVEW +#define VT_BUF_HAVE_MEMSETW #endif /* _ASM_VGA_H */ |