/*
 * "Optimize" a list of dependencies as spit out by gcc -MD
 * for the build framework.
 *
 * Original author:
 *   Copyright    2002 by Kai Germaschewski  <kai.germaschewski@gmx.de>
 *
 * This code has been borrowed from kbuild's fixdep (scripts/basic/fixdep.c),
 * Please check it for detailed explanation. This fixdep borow only the
 * base transformation of dependecies without the CONFIG mangle.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>

char *target;
char *depfile;
char *cmdline;

static void usage(void)
{
	fprintf(stderr, "Usage: fixdep <depfile> <target> <cmdline>\n");
	exit(1);
}

/*
 * Print out the commandline prefixed with cmd_<target filename> :=
 */
static void print_cmdline(void)
{
	printf("cmd_%s := %s\n\n", target, cmdline);
}

/*
 * Important: The below generated source_foo.o and deps_foo.o variable
 * assignments are parsed not only by make, but also by the rather simple
 * parser in scripts/mod/sumversion.c.
 */
static void parse_dep_file(void *map, size_t len)
{
	char *m = map;
	char *end = m + len;
	char *p;
	char s[PATH_MAX];
	int is_target, has_target = 0;
	int saw_any_target = 0;
	int is_first_dep = 0;

	while (m < end) {
		/* Skip any "white space" */
		while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
			m++;
		/* Find next "white space" */
		p = m;
		while (p < end && *p != ' ' && *p != '\\' && *p != '\n')
			p++;
		/* Is the token we found a target name? */
		is_target = (*(p-1) == ':');
		/* Don't write any target names into the dependency file */
		if (is_target) {
			/* The /next/ file is the first dependency */
			is_first_dep = 1;
			has_target = 1;
		} else if (has_target) {
			/* Save this token/filename */
			memcpy(s, m, p-m);
			s[p - m] = 0;

			/*
			 * Do not list the source file as dependency,
			 * so that kbuild is not confused if a .c file
			 * is rewritten into .S or vice versa. Storing
			 * it in source_* is needed for modpost to
			 * compute srcversions.
			 */
			if (is_first_dep) {
				/*
				 * If processing the concatenation of
				 * multiple dependency files, only
				 * process the first target name, which
				 * will be the original source name,
				 * and ignore any other target names,
				 * which will be intermediate temporary
				 * files.
				 */
				if (!saw_any_target) {
					saw_any_target = 1;
					printf("source_%s := %s\n\n",
						target, s);
					printf("deps_%s := \\\n",
						target);
				}
				is_first_dep = 0;
			} else
				printf("  %s \\\n", s);
		}
		/*
		 * Start searching for next token immediately after the first
		 * "whitespace" character that follows this token.
		 */
		m = p + 1;
	}

	if (!saw_any_target) {
		fprintf(stderr, "fixdep: parse error; no targets found\n");
		exit(1);
	}

	printf("\n%s: $(deps_%s)\n\n", target, target);
	printf("$(deps_%s):\n", target);
}

static void print_deps(void)
{
	struct stat st;
	int fd;
	void *map;

	fd = open(depfile, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "fixdep: error opening depfile: ");
		perror(depfile);
		exit(2);
	}
	if (fstat(fd, &st) < 0) {
		fprintf(stderr, "fixdep: error fstat'ing depfile: ");
		perror(depfile);
		exit(2);
	}
	if (st.st_size == 0) {
		fprintf(stderr, "fixdep: %s is empty\n", depfile);
		close(fd);
		return;
	}
	map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
	if ((long) map == -1) {
		perror("fixdep: mmap");
		close(fd);
		return;
	}

	parse_dep_file(map, st.st_size);

	munmap(map, st.st_size);

	close(fd);
}

int main(int argc, char **argv)
{
	if (argc != 4)
		usage();

	depfile = argv[1];
	target  = argv[2];
	cmdline = argv[3];

	print_cmdline();
	print_deps();

	return 0;
}
cted='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Jan Kara &lt;jack@suse.cz&gt;</td><td class='right'>2016-08-10 17:22:44 +0200</td></tr>
<tr><th>committer</th><td>Dan Williams &lt;dan.j.williams@intel.com&gt;</td><td class='right'>2016-12-26 20:29:24 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/storage/unusual_sddr55.h?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55'>c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/storage/unusual_sddr55.h?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55'>7e63a6c0225a769e679b194f54b5723e4cfba385</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/storage/unusual_sddr55.h?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55'>drivers/usb/storage/unusual_sddr55.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/storage/unusual_sddr55.h?id=e568df6b84ff05a22467503afc11bee7a6ba0700'>e568df6b84ff05a22467503afc11bee7a6ba0700</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/storage/unusual_sddr55.h?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55&amp;id2=e568df6b84ff05a22467503afc11bee7a6ba0700'>diff</a>)</td></tr></table>
<div class='commit-subject'>mm: Invalidate DAX radix tree entries only if appropriate</div><div class='commit-msg'>Currently invalidate_inode_pages2_range() and invalidate_mapping_pages()
just delete all exceptional radix tree entries they find. For DAX this
is not desirable as we track cache dirtiness in these entries and when
they are evicted, we may not flush caches although it is necessary. This
can for example manifest when we write to the same block both via mmap
and via write(2) (to different offsets) and fsync(2) then does not
properly flush CPU caches when modification via write(2) was the last
one.

Create appropriate DAX functions to handle invalidation of DAX entries
for invalidate_inode_pages2_range() and invalidate_mapping_pages() and
wire them up into the corresponding mm functions.

Acked-by: Johannes Weiner &lt;hannes@cmpxchg.org&gt;
Reviewed-by: Ross Zwisler &lt;ross.zwisler@linux.intel.com&gt;
Signed-off-by: Jan Kara &lt;jack@suse.cz&gt;
Signed-off-by: Dan Williams &lt;dan.j.williams@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c6dcf52c23d2d3fb5235cec42d7dd3f786b87d55'>Diffstat</a> (limited to 'drivers/usb/storage/unusual_sddr55.h')</div><table summary='diffstat' class='diffstat'>