The patch titled
Subject: lib/vsprintf.c: pull out padding code from dentry_name()
has been added to the -mm tree. Its filename is
lib-vsprintfc-pull-out-padding-code-from-dentry_name.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-vsprintfc-pull-out-padding-code-from-dentry_name.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-vsprintfc-pull-out-padding-code-from-dentry_name.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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------------------------------------------------------
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Subject: lib/vsprintf.c: pull out padding code from dentry_name()
Pull out the logic in dentry_name() which handles field width space
padding, in preparation for reusing it from string(). Rename the widen()
helper to move_right(), since it is used for handling the !(flags & LEFT)
case.
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Maurizio Lombardi <mlombard@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/vsprintf.c | 46 +++++++++++++++++++++++++++++++---------------
1 file changed, 31 insertions(+), 15 deletions(-)
diff -puN lib/vsprintf.c~lib-vsprintfc-pull-out-padding-code-from-dentry_name lib/vsprintf.c
--- a/lib/vsprintf.c~lib-vsprintfc-pull-out-padding-code-from-dentry_name
+++ a/lib/vsprintf.c
@@ -538,7 +538,7 @@ char *string(char *buf, char *end, const
return buf;
}
-static void widen(char *buf, char *end, unsigned len, unsigned spaces)
+static void move_right(char *buf, char *end, unsigned len, unsigned spaces)
{
size_t size;
if (buf >= end) /* nowhere to put anything */
@@ -556,6 +556,35 @@ static void widen(char *buf, char *end,
memset(buf, ' ', spaces);
}
+/*
+ * Handle field width padding for a string.
+ * @buf: current buffer position
+ * @n: length of string
+ * @end: end of output buffer
+ * @spec: for field width and flags
+ * Returns: new buffer position after padding.
+ */
+static noinline_for_stack
+char *widen_string(char *buf, int n, char *end, struct printf_spec spec)
+{
+ unsigned spaces;
+
+ if (likely(n >= spec.field_width))
+ return buf;
+ /* we want to pad the sucker */
+ spaces = spec.field_width - n;
+ if (!(spec.flags & LEFT)) {
+ move_right(buf - n, end, n, spaces);
+ return buf + spaces;
+ }
+ while (spaces--) {
+ if (buf < end)
+ *buf = ' ';
+ ++buf;
+ }
+ return buf;
+}
+
static noinline_for_stack
char *dentry_name(char *buf, char *end, const struct dentry *d, struct printf_spec spec,
const char *fmt)
@@ -597,20 +626,7 @@ char *dentry_name(char *buf, char *end,
*buf = c;
}
rcu_read_unlock();
- if (n < spec.field_width) {
- /* we want to pad the sucker */
- unsigned spaces = spec.field_width - n;
- if (!(spec.flags & LEFT)) {
- widen(buf - n, end, n, spaces);
- return buf + spaces;
- }
- while (spaces--) {
- if (buf < end)
- *buf = ' ';
- ++buf;
- }
- }
- return buf;
+ return widen_string(buf, n, end, spec);
}
static noinline_for_stack
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxx are
lib-vsprintfc-pull-out-padding-code-from-dentry_name.patch
lib-vsprintfc-move-string-below-widen_string.patch
lib-vsprintfc-eliminate-potential-race-in-string.patch
lib-vsprintfc-expand-field_width-to-24-bits.patch
lib-vsprintfc-help-gcc-make-number-smaller.patch
lib-vsprintfc-warn-about-too-large-precisions-and-field-widths.patch
lib-kasprintfc-add-sanity-check-to-kvasprintf.patch
lib-test_printfc-dont-bug.patch
lib-test_printfc-check-for-out-of-bound-writes.patch
lib-test_printfc-test-precision-quirks.patch
lib-test_printfc-add-a-few-number-tests.patch
lib-test_printfc-account-for-kvasprintf-tests.patch
lib-test_printfc-add-test-for-large-bitmaps.patch
lib-test_printfc-test-dentry-printing.patch
powerpc-fadump-rename-cpu_online_mask-member-of-struct-fadump_crash_info_header.patch
kernel-cpuc-change-type-of-cpu_possible_bits-and-friends.patch
kernel-cpuc-export-__cpu__mask.patch
drivers-base-cpuc-use-__cpu__mask-directly.patch
kernel-cpuc-eliminate-cpu__mask.patch
kernel-cpuc-make-set_cpu_-static-inlines.patch
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