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printf: remove %pGt support

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Patch series "Increase the number of bits available in page_type".

Kent wants more than 16 bits in page_type, so I resurrected this old patch
and expanded it a bit.  It's a bit more efficient than our current scheme
(1 4-byte insn vs 3 insns of 13 bytes total) to test a single page type.


This patch (of 4):

An upcoming patch will convert page type from being a bitfield to a
single byte, so we will not be able to use %pG to print the page type
any more.  The printing of the symbolic name will be restored in that
patch.

Link: https://lkml.kernel.org/r/20240821173914.2270383-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20240821173914.2270383-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2024-08-21 18:39:09 +01:00
committed by Andrew Morton
parent f28bdd1b17
commit e27ad6560e
6 changed files with 2 additions and 62 deletions
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21
lib/vsprintf.c
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@@ -2054,25 +2054,6 @@ char *format_page_flags(char *buf, char *end, unsigned long flags)
return buf;
}
static
char *format_page_type(char *buf, char *end, unsigned int page_type)
{
buf = number(buf, end, page_type, default_flag_spec);
if (buf < end)
*buf = '(';
buf++;
if (page_type_has_type(page_type))
buf = format_flags(buf, end, ~page_type, pagetype_names);
if (buf < end)
*buf = ')';
buf++;
return buf;
}
static noinline_for_stack
char *flags_string(char *buf, char *end, void *flags_ptr,
struct printf_spec spec, const char *fmt)
@@ -2086,8 +2067,6 @@ char *flags_string(char *buf, char *end, void *flags_ptr,
switch (fmt[1]) {
case 'p':
return format_page_flags(buf, end, *(unsigned long *)flags_ptr);
case 't':
return format_page_type(buf, end, *(unsigned int *)flags_ptr);
case 'v':
flags = *(unsigned long *)flags_ptr;
names = vmaflag_names;