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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Test cases for printf facility.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/printk.h>
 #include <linux/random.h>
 #include <linux/rtc.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 
 #include <linux/bitmap.h>
 #include <linux/dcache.h>
 #include <linux/socket.h>
 #include <linux/in.h>
 
 #include <linux/gfp.h>
 #include <linux/mm.h>
 
 #include <linux/property.h>
 
 #include "../tools/testing/selftests/kselftest_module.h"
 
 #define BUF_SIZE 256
 #define PAD_SIZE 16
 #define FILL_CHAR '$'
 
 #define NOWARN(option, comment, block) \
     __diag_push(); \
     __diag_ignore_all(#option, comment); \
     block \
     __diag_pop();
 
 KSTM_MODULE_GLOBALS();
 
 static char *test_buffer __initdata;
 static char *alloced_buffer __initdata;
 
 extern bool no_hash_pointers;
 
 static int __printf(4, 0) __init
 do_test(int bufsize, const char *expect, int elen,
     const char *fmt, va_list ap)
 {
     va_list aq;
     int ret, written;
 
     total_tests++;
 
     memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
     va_copy(aq, ap);
     ret = vsnprintf(test_buffer, bufsize, fmt, aq);
     va_end(aq);
 
     if (ret != elen) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
             bufsize, fmt, ret, elen);
         return 1;
     }
 
     if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
         return 1;
     }
 
     if (!bufsize) {
         if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
             pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
                 fmt);
             return 1;
         }
         return 0;
     }
 
     written = min(bufsize-1, elen);
     if (test_buffer[written]) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
             bufsize, fmt);
         return 1;
     }
 
     if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
             bufsize, fmt);
         return 1;
     }
 
     if (memchr_inv(test_buffer + bufsize, FILL_CHAR, BUF_SIZE + PAD_SIZE - bufsize)) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond buffer\n", bufsize, fmt);
         return 1;
     }
 
     if (memcmp(test_buffer, expect, written)) {
         pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
             bufsize, fmt, test_buffer, written, expect);
         return 1;
     }
     return 0;
 }
 
 static void __printf(3, 4) __init
 __test(const char *expect, int elen, const char *fmt, ...)
 {
     va_list ap;
     int rand;
     char *p;
 
     if (elen >= BUF_SIZE) {
         pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
                elen, fmt);
         failed_tests++;
         return;
     }
 
     va_start(ap, fmt);
 
     /*
      * Every fmt+args is subjected to four tests: Three where we
      * tell vsnprintf varying buffer sizes (plenty, not quite
      * enough and 0), and then we also test that kvasprintf would
      * be able to print it as expected.
      */
     failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
     rand = 1 + prandom_u32_max(elen+1);
     /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
     failed_tests += do_test(rand, expect, elen, fmt, ap);
     failed_tests += do_test(0, expect, elen, fmt, ap);
 
     p = kvasprintf(GFP_KERNEL, fmt, ap);
     if (p) {
         total_tests++;
         if (memcmp(p, expect, elen+1)) {
             pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
                 fmt, p, expect);
             failed_tests++;
         }
         kfree(p);
     }
     va_end(ap);
 }
 
 #define test(expect, fmt, ...)                  \
     __test(expect, strlen(expect), fmt, ##__VA_ARGS__)
 
 static void __init
 test_basic(void)
 {
     /* Work around annoying "warning: zero-length gnu_printf format string". */
     char nul = '\0';
 
     test("", &nul);
     test("100%", "100%%");
     test("xxx%yyy", "xxx%cyyy", '%');
     __test("xxx\0yyy", 7, "xxx%cyyy", '\0');
 }
 
 static void __init
 test_number(void)
 {
     test("0x1234abcd  ", "%#-12x", 0x1234abcd);
     test("  0x1234abcd", "%#12x", 0x1234abcd);
     test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234);
     NOWARN(-Wformat, "Intentionally test narrowing conversion specifiers.", {
         test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1);
         test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1);
         test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);
     })
     /*
      * POSIX/C99: »The result of converting zero with an explicit
      * precision of zero shall be no characters.« Hence the output
      * from the below test should really be "00|0||| ". However,
      * the kernel's printf also produces a single 0 in that
      * case. This test case simply documents the current
      * behaviour.
      */
     test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0);
 #ifndef __CHAR_UNSIGNED__
     {
         /*
          * Passing a 'char' to a %02x specifier doesn't do
          * what was presumably the intention when char is
          * signed and the value is negative. One must either &
          * with 0xff or cast to u8.
          */
         char val = -16;
         test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val);
     }
 #endif
 }
 
 static void __init
 test_string(void)
 {
     test("", "%s%.0s", "", "123");
     test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456");
     test("1  |  2|3  |  4|5  ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
     test("1234      ", "%-10.4s", "123456");
     test("      1234", "%10.4s", "123456");
     /*
      * POSIX and C99 say that a negative precision (which is only
      * possible to pass via a * argument) should be treated as if
      * the precision wasn't present, and that if the precision is
      * omitted (as in %.s), the precision should be taken to be
      * 0. However, the kernel's printf behave exactly opposite,
      * treating a negative precision as 0 and treating an omitted
      * precision specifier as if no precision was given.
      *
      * These test cases document the current behaviour; should
      * anyone ever feel the need to follow the standards more
      * closely, this can be revisited.
      */
     test("    ", "%4.*s", -5, "123456");
     test("123456", "%.s", "123456");
     test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c");
     test("a  |   |   ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c");
 }
 
 #define PLAIN_BUF_SIZE 64   /* leave some space so we don't oops */
 
 #if BITS_PER_LONG == 64
 
 #define PTR_WIDTH 16
 #define PTR ((void *)0xffff0123456789abUL)
 #define PTR_STR "ffff0123456789ab"
 #define PTR_VAL_NO_CRNG "(____ptrval____)"
 #define ZEROS "00000000"    /* hex 32 zero bits */
 #define ONES "ffffffff"     /* hex 32 one bits */
 
 static int __init
 plain_format(void)
 {
     char buf[PLAIN_BUF_SIZE];
     int nchars;
 
     nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);
 
     if (nchars != PTR_WIDTH)
         return -1;
 
     if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
         pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
             PTR_VAL_NO_CRNG);
         return 0;
     }
 
     if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
         return -1;
 
     return 0;
 }
 
 #else
 
 #define PTR_WIDTH 8
 #define PTR ((void *)0x456789ab)
 #define PTR_STR "456789ab"
 #define PTR_VAL_NO_CRNG "(ptrval)"
 #define ZEROS ""
 #define ONES ""
 
 static int __init
 plain_format(void)
 {
     /* Format is implicitly tested for 32 bit machines by plain_hash() */
     return 0;
 }
 
 #endif  /* BITS_PER_LONG == 64 */
 
 static int __init
 plain_hash_to_buffer(const void *p, char *buf, size_t len)
 {
     int nchars;
 
     nchars = snprintf(buf, len, "%p", p);
 
     if (nchars != PTR_WIDTH)
         return -1;
 
     if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
         pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
             PTR_VAL_NO_CRNG);
         return 0;
     }
 
     return 0;
 }
 
 static int __init
 plain_hash(void)
 {
     char buf[PLAIN_BUF_SIZE];
     int ret;
 
     ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE);
     if (ret)
         return ret;
 
     if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
         return -1;
 
     return 0;
 }
 
 /*
  * We can't use test() to test %p because we don't know what output to expect
  * after an address is hashed.
  */
 static void __init
 plain(void)
 {
     int err;
 
     if (no_hash_pointers) {
         pr_warn("skipping plain 'p' tests");
         skipped_tests += 2;
         return;
     }
 
     err = plain_hash();
     if (err) {
         pr_warn("plain 'p' does not appear to be hashed\n");
         failed_tests++;
         return;
     }
 
     err = plain_format();
     if (err) {
         pr_warn("hashing plain 'p' has unexpected format\n");
         failed_tests++;
     }
 }
 
 static void __init
 test_hashed(const char *fmt, const void *p)
 {
     char buf[PLAIN_BUF_SIZE];
     int ret;
 
     /*
      * No need to increase failed test counter since this is assumed
      * to be called after plain().
      */
     ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE);
     if (ret)
         return;
 
     test(buf, fmt, p);
 }
 
 /*
  * NULL pointers aren't hashed.
  */
 static void __init
 null_pointer(void)
 {
     test(ZEROS "00000000", "%p", NULL);
     test(ZEROS "00000000", "%px", NULL);
     test("(null)", "%pE", NULL);
 }
 
 /*
  * Error pointers aren't hashed.
  */
 static void __init
 error_pointer(void)
 {
     test(ONES "fffffff5", "%p", ERR_PTR(-11));
     test(ONES "fffffff5", "%px", ERR_PTR(-11));
     test("(efault)", "%pE", ERR_PTR(-11));
 }
 
 #define PTR_INVALID ((void *)0x000000ab)
 
 static void __init
 invalid_pointer(void)
 {
     test_hashed("%p", PTR_INVALID);
     test(ZEROS "000000ab", "%px", PTR_INVALID);
     test("(efault)", "%pE", PTR_INVALID);
 }
 
 static void __init
 symbol_ptr(void)
 {
 }
 
 static void __init
 kernel_ptr(void)
 {
     /* We can't test this without access to kptr_restrict. */
 }
 
 static void __init
 struct_resource(void)
 {
 }
 
 static void __init
 addr(void)
 {
 }
 
 static void __init
 escaped_str(void)
 {
 }
 
 static void __init
 hex_string(void)
 {
     const char buf[3] = {0xc0, 0xff, 0xee};
 
     test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
          "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf);
     test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
          "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf);
 }
 
 static void __init
 mac(void)
 {
     const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
 
     test("2d:48:d6:fc:7a:05", "%pM", addr);
     test("05:7a:fc:d6:48:2d", "%pMR", addr);
     test("2d-48-d6-fc-7a-05", "%pMF", addr);
     test("2d48d6fc7a05", "%pm", addr);
     test("057afcd6482d", "%pmR", addr);
 }
 
 static void __init
 ip4(void)
 {
     struct sockaddr_in sa;
 
     sa.sin_family = AF_INET;
     sa.sin_port = cpu_to_be16(12345);
     sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
 
     test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr);
     test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa);
     sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
     test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa);
 }
 
 static void __init
 ip6(void)
 {
 }
 
 static void __init
 ip(void)
 {
     ip4();
     ip6();
 }
 
 static void __init
 uuid(void)
 {
     const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
                    0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
 
     test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
     test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
     test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
     test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
 }
 
 static struct dentry test_dentry[4] __initdata = {
     { .d_parent = &test_dentry[0],
       .d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
       .d_iname = "foo" },
     { .d_parent = &test_dentry[0],
       .d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
       .d_iname = "bravo" },
     { .d_parent = &test_dentry[1],
       .d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
       .d_iname = "alfa" },
     { .d_parent = &test_dentry[2],
       .d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
       .d_iname = "romeo" },
 };
 
 static void __init
 dentry(void)
 {
     test("foo", "%pd", &test_dentry[0]);
     test("foo", "%pd2", &test_dentry[0]);
 
     test("(null)", "%pd", NULL);
     test("(efault)", "%pd", PTR_INVALID);
     test("(null)", "%pD", NULL);
     test("(efault)", "%pD", PTR_INVALID);
 
     test("romeo", "%pd", &test_dentry[3]);
     test("alfa/romeo", "%pd2", &test_dentry[3]);
     test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
     test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
     test("/bravo/alfa", "%pd4", &test_dentry[2]);
 
     test("bravo/alfa  |bravo/alfa  ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
     test("  bravo/alfa|  bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
 }
 
 static void __init
 struct_va_format(void)
 {
 }
 
 static void __init
 time_and_date(void)
 {
     /* 1543210543 */
     const struct rtc_time tm = {
         .tm_sec = 43,
         .tm_min = 35,
         .tm_hour = 5,
         .tm_mday = 26,
         .tm_mon = 10,
         .tm_year = 118,
     };
     /* 2019-01-04T15:32:23 */
     time64_t t = 1546615943;
 
     test("(%pt?)", "%pt", &tm);
     test("2018-11-26T05:35:43", "%ptR", &tm);
     test("0118-10-26T05:35:43", "%ptRr", &tm);
     test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm);
     test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm);
     test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm);
     test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm);
 
     test("2019-01-04T15:32:23", "%ptT", &t);
     test("0119-00-04T15:32:23", "%ptTr", &t);
     test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);
     test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);
 
     test("2019-01-04 15:32:23", "%ptTs", &t);
     test("0119-00-04 15:32:23", "%ptTsr", &t);
     test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t);
     test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t);
 }
 
 static void __init
 struct_clk(void)
 {
 }
 
 static void __init
 large_bitmap(void)
 {
     const int nbits = 1 << 16;
     unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);
     if (!bits)
         return;
 
     bitmap_set(bits, 1, 20);
     bitmap_set(bits, 60000, 15);
     test("1-20,60000-60014", "%*pbl", nbits, bits);
     bitmap_free(bits);
 }
 
 static void __init
 bitmap(void)
 {
     DECLARE_BITMAP(bits, 20);
     const int primes[] = {2,3,5,7,11,13,17,19};
     int i;
 
     bitmap_zero(bits, 20);
     test("00000|00000", "%20pb|%*pb", bits, 20, bits);
     test("|", "%20pbl|%*pbl", bits, 20, bits);
 
     for (i = 0; i < ARRAY_SIZE(primes); ++i)
         set_bit(primes[i], bits);
     test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits);
     test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits);
 
     bitmap_fill(bits, 20);
     test("fffff|fffff", "%20pb|%*pb", bits, 20, bits);
     test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits);
 
     large_bitmap();
 }
 
 static void __init
 netdev_features(void)
 {
 }
 
 struct page_flags_test {
     int width;
     int shift;
     int mask;
     const char *fmt;
     const char *name;
 };
 
 static const struct page_flags_test pft[] = {
     {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
      "%d", "section"},
     {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
      "%d", "node"},
     {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
      "%d", "zone"},
     {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
      "%#x", "lastcpupid"},
     {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
      "%#x", "kasantag"},
 };
 
 static void __init
 page_flags_test(int section, int node, int zone, int last_cpupid,
         int kasan_tag, unsigned long flags, const char *name,
         char *cmp_buf)
 {
     unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};
     unsigned long size;
     bool append = false;
     int i;
 
     for (i = 0; i < ARRAY_SIZE(values); i++)
         flags |= (values[i] & pft[i].mask) << pft[i].shift;
 
     size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags);
     if (flags & PAGEFLAGS_MASK) {
         size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
         append = true;
     }
 
     for (i = 0; i < ARRAY_SIZE(pft); i++) {
         if (!pft[i].width)
             continue;
 
         if (append)
             size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|");
 
         size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=",
                 pft[i].name);
         size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,
                 values[i] & pft[i].mask);
         append = true;
     }
 
     snprintf(cmp_buf + size, BUF_SIZE - size, ")");
 
     test(cmp_buf, "%pGp", &flags);
 }
 
 static void __init
 flags(void)
 {
     unsigned long flags;
     char *cmp_buffer;
     gfp_t gfp;
 
     cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
     if (!cmp_buffer)
         return;
 
     flags = 0;
     page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
 
     flags = 1UL << NR_PAGEFLAGS;
     page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
 
     flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
         | 1UL << PG_active | 1UL << PG_swapbacked;
     page_flags_test(1, 1, 1, 0x1fffff, 1, flags,
             "uptodate|dirty|lru|active|swapbacked",
             cmp_buffer);
 
     flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
     test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags);
 
     gfp = GFP_TRANSHUGE;
     test("GFP_TRANSHUGE", "%pGg", &gfp);
 
     gfp = GFP_ATOMIC|__GFP_DMA;
     test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);
 
     gfp = __GFP_ATOMIC;
     test("__GFP_ATOMIC", "%pGg", &gfp);
 
     /* Any flags not translated by the table should remain numeric */
     gfp = ~__GFP_BITS_MASK;
     snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
     test(cmp_buffer, "%pGg", &gfp);
 
     snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx",
                             (unsigned long) gfp);
     gfp |= __GFP_ATOMIC;
     test(cmp_buffer, "%pGg", &gfp);
 
     kfree(cmp_buffer);
 }
 
 static void __init fwnode_pointer(void)
 {
     const struct software_node softnodes[] = {
         { .name = "first", },
         { .name = "second", .parent = &softnodes[0], },
         { .name = "third", .parent = &softnodes[1], },
         { NULL /* Guardian */ }
     };
     const char * const full_name = "first/second/third";
     const char * const full_name_second = "first/second";
     const char * const second_name = "second";
     const char * const third_name = "third";
     int rval;
 
     rval = software_node_register_nodes(softnodes);
     if (rval) {
         pr_warn("cannot register softnodes; rval %d\n", rval);
         return;
     }
 
     test(full_name_second, "%pfw", software_node_fwnode(&softnodes[1]));
     test(full_name, "%pfw", software_node_fwnode(&softnodes[2]));
     test(full_name, "%pfwf", software_node_fwnode(&softnodes[2]));
     test(second_name, "%pfwP", software_node_fwnode(&softnodes[1]));
     test(third_name, "%pfwP", software_node_fwnode(&softnodes[2]));
 
     software_node_unregister_nodes(softnodes);
 }
 
 static void __init fourcc_pointer(void)
 {
     struct {
         u32 code;
         char *str;
     } const try[] = {
         { 0x3231564e, "NV12 little-endian (0x3231564e)", },
         { 0xb231564e, "NV12 big-endian (0xb231564e)", },
         { 0x10111213, ".... little-endian (0x10111213)", },
         { 0x20303159, "Y10  little-endian (0x20303159)", },
     };
     unsigned int i;
 
     for (i = 0; i < ARRAY_SIZE(try); i++)
         test(try[i].str, "%p4cc", &try[i].code);
 }
 
 static void __init
 errptr(void)
 {
     test("-1234", "%pe", ERR_PTR(-1234));
 
     /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
     BUILD_BUG_ON(IS_ERR(PTR));
     test_hashed("%pe", PTR);
 
 #ifdef CONFIG_SYMBOLIC_ERRNAME
     test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
     test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
     BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
     test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
     test("[-EIO    ]", "[%-8pe]", ERR_PTR(-EIO));
     test("[    -EIO]", "[%8pe]", ERR_PTR(-EIO));
     test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
 #endif
 }
 
 static void __init
 test_pointer(void)
 {
     plain();
     null_pointer();
     error_pointer();
     invalid_pointer();
     symbol_ptr();
     kernel_ptr();
     struct_resource();
     addr();
     escaped_str();
     hex_string();
     mac();
     ip();
     uuid();
     dentry();
     struct_va_format();
     time_and_date();
     struct_clk();
     bitmap();
     netdev_features();
     flags();
     errptr();
     fwnode_pointer();
     fourcc_pointer();
 }
 
 static void __init selftest(void)
 {
     alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
     if (!alloced_buffer)
         return;
     test_buffer = alloced_buffer + PAD_SIZE;
 
     test_basic();
     test_number();
     test_string();
     test_pointer();
 
     kfree(alloced_buffer);
 }
 
 KSTM_MODULE_LOADERS(test_printf);
 MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
 MODULE_LICENSE("GPL");

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