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GNU C Library master sources branch, master, updated. glibc-2.15-523-g20fde22
- From: davem at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 29 Mar 2012 21:39:43 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.15-523-g20fde22
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=20fde227388fb0c2857ff1793754056b833697fe
commit 20fde227388fb0c2857ff1793754056b833697fe
Author: David S. Miller <davem@davemloft.net>
Date: Thu Mar 29 14:38:27 2012 -0700
Remove xsputn small copy optimization.
* libio/fileops.c (_IO_new_file_xsputn): Don't try to optimize
small copies by hand.
diff --git a/ChangeLog b/ChangeLog
index 165a178..ec22026 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-03-29 David S. Miller <davem@davemloft.net>
+
+ * libio/fileops.c (_IO_new_file_xsputn): Don't try to optimize
+ small copies by hand.
+
2012-03-28 Siddhesh Poyarekar <siddhesh@redhat.com>
[BZ #13761]
diff --git a/libio/fileops.c b/libio/fileops.c
index 95e09b4..a2e8dac 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -1341,24 +1341,13 @@ _IO_new_file_xsputn (f, data, n)
{
if (count > to_do)
count = to_do;
- if (count > 20)
- {
#ifdef _LIBC
- f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
+ f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
#else
- memcpy (f->_IO_write_ptr, s, count);
- f->_IO_write_ptr += count;
+ memcpy (f->_IO_write_ptr, s, count);
+ f->_IO_write_ptr += count;
#endif
- s += count;
- }
- else
- {
- register char *p = f->_IO_write_ptr;
- register int i = (int) count;
- while (--i >= 0)
- *p++ = *s++;
- f->_IO_write_ptr = p;
- }
+ s += count;
to_do -= count;
}
if (to_do + must_flush > 0)
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 5 +++++
libio/fileops.c | 19 ++++---------------
2 files changed, 9 insertions(+), 15 deletions(-)
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