diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-16 02:39:15 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-16 02:39:15 +0300 |
commit | eea3a00264cf243a28e4331566ce67b86059339d (patch) | |
tree | 487f16389e0dfa32e9caa7604d1274a7dcda8f04 /lib/vsprintf.c | |
parent | e7c82412433a8039616c7314533a0a1c025d99bf (diff) | |
parent | e693d73c20ffdb06840c9378f367bad849ac0d5d (diff) | |
download | linux-eea3a00264cf243a28e4331566ce67b86059339d.tar.xz |
Merge branch 'akpm' (patches from Andrew)
Merge second patchbomb from Andrew Morton:
- the rest of MM
- various misc bits
- add ability to run /sbin/reboot at reboot time
- printk/vsprintf changes
- fiddle with seq_printf() return value
* akpm: (114 commits)
parisc: remove use of seq_printf return value
lru_cache: remove use of seq_printf return value
tracing: remove use of seq_printf return value
cgroup: remove use of seq_printf return value
proc: remove use of seq_printf return value
s390: remove use of seq_printf return value
cris fasttimer: remove use of seq_printf return value
cris: remove use of seq_printf return value
openrisc: remove use of seq_printf return value
ARM: plat-pxa: remove use of seq_printf return value
nios2: cpuinfo: remove use of seq_printf return value
microblaze: mb: remove use of seq_printf return value
ipc: remove use of seq_printf return value
rtc: remove use of seq_printf return value
power: wakeup: remove use of seq_printf return value
x86: mtrr: if: remove use of seq_printf return value
linux/bitmap.h: improve BITMAP_{LAST,FIRST}_WORD_MASK
MAINTAINERS: CREDITS: remove Stefano Brivio from B43
.mailmap: add Ricardo Ribalda
CREDITS: add Ricardo Ribalda Delgado
...
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r-- | lib/vsprintf.c | 110 |
1 files changed, 72 insertions, 38 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index b235c96167d3..3a1e0843f9a2 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -17,6 +17,7 @@ */ #include <stdarg.h> +#include <linux/clk-provider.h> #include <linux/module.h> /* for KSYM_SYMBOL_LEN */ #include <linux/types.h> #include <linux/string.h> @@ -340,11 +341,11 @@ int num_to_str(char *buf, int size, unsigned long long num) return len; } -#define ZEROPAD 1 /* pad with zero */ -#define SIGN 2 /* unsigned/signed long */ +#define SIGN 1 /* unsigned/signed, must be 1 */ +#define LEFT 2 /* left justified */ #define PLUS 4 /* show plus */ #define SPACE 8 /* space if plus */ -#define LEFT 16 /* left justified */ +#define ZEROPAD 16 /* pad with zero, must be 16 == '0' - ' ' */ #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ @@ -383,10 +384,7 @@ static noinline_for_stack char *number(char *buf, char *end, unsigned long long num, struct printf_spec spec) { - /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ - static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ - - char tmp[66]; + char tmp[3 * sizeof(num)]; char sign; char locase; int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); @@ -422,12 +420,7 @@ char *number(char *buf, char *end, unsigned long long num, /* generate full string in tmp[], in reverse order */ i = 0; if (num < spec.base) - tmp[i++] = digits[num] | locase; - /* Generic code, for any base: - else do { - tmp[i++] = (digits[do_div(num,base)] | locase); - } while (num != 0); - */ + tmp[i++] = hex_asc_upper[num] | locase; else if (spec.base != 10) { /* 8 or 16 */ int mask = spec.base - 1; int shift = 3; @@ -435,7 +428,7 @@ char *number(char *buf, char *end, unsigned long long num, if (spec.base == 16) shift = 4; do { - tmp[i++] = (digits[((unsigned char)num) & mask] | locase); + tmp[i++] = (hex_asc_upper[((unsigned char)num) & mask] | locase); num >>= shift; } while (num); } else { /* base 10 */ @@ -447,7 +440,7 @@ char *number(char *buf, char *end, unsigned long long num, spec.precision = i; /* leading space padding */ spec.field_width -= spec.precision; - if (!(spec.flags & (ZEROPAD+LEFT))) { + if (!(spec.flags & (ZEROPAD | LEFT))) { while (--spec.field_width >= 0) { if (buf < end) *buf = ' '; @@ -475,7 +468,8 @@ char *number(char *buf, char *end, unsigned long long num, } /* zero or space padding */ if (!(spec.flags & LEFT)) { - char c = (spec.flags & ZEROPAD) ? '0' : ' '; + char c = ' ' + (spec.flags & ZEROPAD); + BUILD_BUG_ON(' ' + ZEROPAD != '0'); while (--spec.field_width >= 0) { if (buf < end) *buf = c; @@ -783,11 +777,19 @@ char *hex_string(char *buf, char *end, u8 *addr, struct printf_spec spec, if (spec.field_width > 0) len = min_t(int, spec.field_width, 64); - for (i = 0; i < len && buf < end - 1; i++) { - buf = hex_byte_pack(buf, addr[i]); + for (i = 0; i < len; ++i) { + if (buf < end) + *buf = hex_asc_hi(addr[i]); + ++buf; + if (buf < end) + *buf = hex_asc_lo(addr[i]); + ++buf; - if (buf < end && separator && i != len - 1) - *buf++ = separator; + if (separator && i != len - 1) { + if (buf < end) + *buf = separator; + ++buf; + } } return buf; @@ -1233,8 +1235,12 @@ char *escaped_string(char *buf, char *end, u8 *addr, struct printf_spec spec, len = spec.field_width < 0 ? 1 : spec.field_width; - /* Ignore the error. We print as many characters as we can */ - string_escape_mem(addr, len, &buf, end - buf, flags, NULL); + /* + * string_escape_mem() writes as many characters as it can to + * the given buffer, and returns the total size of the output + * had the buffer been big enough. + */ + buf += string_escape_mem(addr, len, buf, buf < end ? end - buf : 0, flags, NULL); return buf; } @@ -1322,6 +1328,30 @@ char *address_val(char *buf, char *end, const void *addr, return number(buf, end, num, spec); } +static noinline_for_stack +char *clock(char *buf, char *end, struct clk *clk, struct printf_spec spec, + const char *fmt) +{ + if (!IS_ENABLED(CONFIG_HAVE_CLK) || !clk) + return string(buf, end, NULL, spec); + + switch (fmt[1]) { + case 'r': + return number(buf, end, clk_get_rate(clk), spec); + + case 'n': + default: +#ifdef CONFIG_COMMON_CLK + return string(buf, end, __clk_get_name(clk), spec); +#else + spec.base = 16; + spec.field_width = sizeof(unsigned long) * 2 + 2; + spec.flags |= SPECIAL | SMALL | ZEROPAD; + return number(buf, end, (unsigned long)clk, spec); +#endif + } +} + int kptr_restrict __read_mostly; /* @@ -1404,6 +1434,11 @@ int kptr_restrict __read_mostly; * (default assumed to be phys_addr_t, passed by reference) * - 'd[234]' For a dentry name (optionally 2-4 last components) * - 'D[234]' Same as 'd' but for a struct file + * - 'C' For a clock, it prints the name (Common Clock Framework) or address + * (legacy clock framework) of the clock + * - 'Cn' For a clock, it prints the name (Common Clock Framework) or address + * (legacy clock framework) of the clock + * - 'Cr' For a clock, it prints the current rate of the clock * * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 * function pointers are really function descriptors, which contain a @@ -1548,6 +1583,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, return address_val(buf, end, ptr, spec, fmt); case 'd': return dentry_name(buf, end, ptr, spec, fmt); + case 'C': + return clock(buf, end, ptr, spec, fmt); case 'D': return dentry_name(buf, end, ((const struct file *)ptr)->f_path.dentry, @@ -1738,29 +1775,21 @@ qualifier: if (spec->qualifier == 'L') spec->type = FORMAT_TYPE_LONG_LONG; else if (spec->qualifier == 'l') { - if (spec->flags & SIGN) - spec->type = FORMAT_TYPE_LONG; - else - spec->type = FORMAT_TYPE_ULONG; + BUILD_BUG_ON(FORMAT_TYPE_ULONG + SIGN != FORMAT_TYPE_LONG); + spec->type = FORMAT_TYPE_ULONG + (spec->flags & SIGN); } else if (_tolower(spec->qualifier) == 'z') { spec->type = FORMAT_TYPE_SIZE_T; } else if (spec->qualifier == 't') { spec->type = FORMAT_TYPE_PTRDIFF; } else if (spec->qualifier == 'H') { - if (spec->flags & SIGN) - spec->type = FORMAT_TYPE_BYTE; - else - spec->type = FORMAT_TYPE_UBYTE; + BUILD_BUG_ON(FORMAT_TYPE_UBYTE + SIGN != FORMAT_TYPE_BYTE); + spec->type = FORMAT_TYPE_UBYTE + (spec->flags & SIGN); } else if (spec->qualifier == 'h') { - if (spec->flags & SIGN) - spec->type = FORMAT_TYPE_SHORT; - else - spec->type = FORMAT_TYPE_USHORT; + BUILD_BUG_ON(FORMAT_TYPE_USHORT + SIGN != FORMAT_TYPE_SHORT); + spec->type = FORMAT_TYPE_USHORT + (spec->flags & SIGN); } else { - if (spec->flags & SIGN) - spec->type = FORMAT_TYPE_INT; - else - spec->type = FORMAT_TYPE_UINT; + BUILD_BUG_ON(FORMAT_TYPE_UINT + SIGN != FORMAT_TYPE_INT); + spec->type = FORMAT_TYPE_UINT + (spec->flags & SIGN); } return ++fmt - start; @@ -1800,6 +1829,11 @@ qualifier: * %*pE[achnops] print an escaped buffer * %*ph[CDN] a variable-length hex string with a separator (supports up to 64 * bytes of the input) + * %pC output the name (Common Clock Framework) or address (legacy clock + * framework) of a clock + * %pCn output the name (Common Clock Framework) or address (legacy clock + * framework) of a clock + * %pCr output the current rate of a clock * %n is ignored * * ** Please update Documentation/printk-formats.txt when making changes ** |