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Revert "um: Use swap() to make code cleaner" 

This reverts commit 9b0da3f223.

The sigio.c is clearly user space code which is handled by
arch/um/scripts/Makefile.rules (see USER_OBJS rule).

The above mentioned commit simply broke this agreement,
we may not use Linux kernel internal headers in them without
thorough thinking.

Hence, revert the wrong commit.

Link: https://lkml.kernel.org/r/20230724143131.30090-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307212304.cH79zJp1-lkp@intel.com/
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Herve Codina <herve.codina@bootlin.com>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Richard Weinberger <richard@nod.at>
Cc: Yang Guang <yang.guang5@zte.com.cn>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Andy Shevchenko 2023-07-24 17:31:31 +03:00 committed by Andrew Morton
parent d1836a3b2a
commit dddfa05eb5
1 changed files with 4 additions and 3 deletions
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7
arch/um/os-Linux/sigio.c
View File

@ -3,7 +3,6 @@
* Copyright (C) 2002 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/minmax.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
@ -51,7 +50,7 @@ static struct pollfds all_sigio_fds;
static int write_sigio_thread(void *unused)
{
struct pollfds *fds;
struct pollfds *fds, tmp;
struct pollfd *p;
int i, n, respond_fd;
char c;
@ -78,7 +77,9 @@ static int write_sigio_thread(void *unused)
"write_sigio_thread : "
"read on socket failed, "
"err = %d\n", errno);
swap(current_poll, next_poll);
tmp = current_poll;
current_poll = next_poll;
next_poll = tmp;
respond_fd = sigio_private[1];
}
else {