From e7d2860b690d4f3bed6824757c540579638e3d1e Mon Sep 17 00:00:00 2001 From: André Goddard Rosa Date: Mon, 14 Dec 2009 18:01:06 -0800 Subject: tree-wide: convert open calls to remove spaces to skip_spaces() lib function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Makes use of skip_spaces() defined in lib/string.c for removing leading spaces from strings all over the tree. It decreases lib.a code size by 47 bytes and reuses the function tree-wide: text data bss dec hex filename 64688 584 592 65864 10148 (TOTALS-BEFORE) 64641 584 592 65817 10119 (TOTALS-AFTER) Also, while at it, if we see (*str && isspace(*str)), we can be sure to remove the first condition (*str) as the second one (isspace(*str)) also evaluates to 0 whenever *str == 0, making it redundant. In other words, "a char equals zero is never a space". Julia Lawall tried the semantic patch (http://coccinelle.lip6.fr) below, and found occurrences of this pattern on 3 more files: drivers/leds/led-class.c drivers/leds/ledtrig-timer.c drivers/video/output.c @@ expression str; @@ ( // ignore skip_spaces cases while (*str && isspace(*str)) { \(str++;\|++str;\) } | - *str && isspace(*str) ) Signed-off-by: André Goddard Rosa Cc: Julia Lawall Cc: Martin Schwidefsky Cc: Jeff Dike Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Richard Purdie Cc: Neil Brown Cc: Kyle McMartin Cc: Henrique de Moraes Holschuh Cc: David Howells Cc: Cc: Samuel Ortiz Cc: Patrick McHardy Cc: Takashi Iwai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/leds/led-class.c | 2 +- drivers/leds/ledtrig-timer.c | 4 ++-- drivers/md/dm-table.c | 6 ++---- drivers/md/md.c | 4 ++-- drivers/parisc/pdc_stable.c | 9 +++------ drivers/platform/x86/thinkpad_acpi.c | 7 ++----- drivers/pnp/interface.c | 36 ++++++++++------------------------- drivers/s390/block/dasd_proc.c | 5 +++-- drivers/video/backlight/lcd.c | 4 ++-- drivers/video/display/display-sysfs.c | 2 +- drivers/video/output.c | 2 +- 11 files changed, 29 insertions(+), 52 deletions(-) (limited to 'drivers') diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index f2cc13d7681..782f95822ea 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -50,7 +50,7 @@ static ssize_t led_brightness_store(struct device *dev, unsigned long state = simple_strtoul(buf, &after, 10); size_t count = after - buf; - if (*after && isspace(*after)) + if (isspace(*after)) count++; if (count == size) { diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c index 3b83406de75..38b3378be44 100644 --- a/drivers/leds/ledtrig-timer.c +++ b/drivers/leds/ledtrig-timer.c @@ -83,7 +83,7 @@ static ssize_t led_delay_on_store(struct device *dev, unsigned long state = simple_strtoul(buf, &after, 10); size_t count = after - buf; - if (*after && isspace(*after)) + if (isspace(*after)) count++; if (count == size) { @@ -127,7 +127,7 @@ static ssize_t led_delay_off_store(struct device *dev, unsigned long state = simple_strtoul(buf, &after, 10); size_t count = after - buf; - if (*after && isspace(*after)) + if (isspace(*after)) count++; if (count == size) { diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 1a6cb3c7822..91976e8fae5 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -600,11 +601,8 @@ int dm_split_args(int *argc, char ***argvp, char *input) return -ENOMEM; while (1) { - start = end; - /* Skip whitespace */ - while (*start && isspace(*start)) - start++; + start = skip_spaces(end); if (!*start) break; /* success, we hit the end */ diff --git a/drivers/md/md.c b/drivers/md/md.c index e1f3c1715cc..6f9148623a4 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -39,6 +39,7 @@ #include /* for invalidate_bdev */ #include #include +#include #include #include #include @@ -3439,8 +3440,7 @@ bitmap_store(mddev_t *mddev, const char *buf, size_t len) } if (*end && !isspace(*end)) break; bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); - buf = end; - while (isspace(*buf)) buf++; + buf = skip_spaces(end); } bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ out: diff --git a/drivers/parisc/pdc_stable.c b/drivers/parisc/pdc_stable.c index 13a64bc081b..0bc5d474b16 100644 --- a/drivers/parisc/pdc_stable.c +++ b/drivers/parisc/pdc_stable.c @@ -779,12 +779,9 @@ static ssize_t pdcs_auto_write(struct kobject *kobj, read_unlock(&pathentry->rw_lock); DPRINTK("%s: flags before: 0x%X\n", __func__, flags); - - temp = in; - - while (*temp && isspace(*temp)) - temp++; - + + temp = skip_spaces(in); + c = *temp++ - '0'; if ((c != 0) && (c != 1)) goto parse_error; diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 0ed84806f8a..cf61d6a8ef6 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -1006,11 +1006,8 @@ static int parse_strtoul(const char *buf, { char *endp; - while (*buf && isspace(*buf)) - buf++; - *value = simple_strtoul(buf, &endp, 0); - while (*endp && isspace(*endp)) - endp++; + *value = simple_strtoul(skip_spaces(buf), &endp, 0); + endp = skip_spaces(endp); if (*endp || *value > max) return -EINVAL; diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c index c3f1c8e9d25..68b0c04987e 100644 --- a/drivers/pnp/interface.c +++ b/drivers/pnp/interface.c @@ -310,8 +310,7 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, goto done; } - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf); if (!strnicmp(buf, "disable", 7)) { retval = pnp_disable_dev(dev); goto done; @@ -353,19 +352,13 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, pnp_init_resources(dev); mutex_lock(&pnp_res_mutex); while (1) { - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf); if (!strnicmp(buf, "io", 2)) { - buf += 2; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 2); start = simple_strtoul(buf, &buf, 0); - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf); if (*buf == '-') { - buf += 1; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 1); end = simple_strtoul(buf, &buf, 0); } else end = start; @@ -373,16 +366,11 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, continue; } if (!strnicmp(buf, "mem", 3)) { - buf += 3; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 3); start = simple_strtoul(buf, &buf, 0); - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf); if (*buf == '-') { - buf += 1; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 1); end = simple_strtoul(buf, &buf, 0); } else end = start; @@ -390,17 +378,13 @@ static ssize_t pnp_set_current_resources(struct device *dmdev, continue; } if (!strnicmp(buf, "irq", 3)) { - buf += 3; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 3); start = simple_strtoul(buf, &buf, 0); pnp_add_irq_resource(dev, start, 0); continue; } if (!strnicmp(buf, "dma", 3)) { - buf += 3; - while (isspace(*buf)) - ++buf; + buf = skip_spaces(buf + 3); start = simple_strtoul(buf, &buf, 0); pnp_add_dma_resource(dev, start, 0); continue; diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index 5f23eca8280..6315fbd8e68 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -14,6 +14,7 @@ #define KMSG_COMPONENT "dasd" #include +#include #include #include #include @@ -272,10 +273,10 @@ dasd_statistics_write(struct file *file, const char __user *user_buf, DBF_EVENT(DBF_DEBUG, "/proc/dasd/statictics: '%s'\n", buffer); /* check for valid verbs */ - for (str = buffer; isspace(*str); str++); + str = skip_spaces(buffer); if (strncmp(str, "set", 3) == 0 && isspace(str[3])) { /* 'set xxx' was given */ - for (str = str + 4; isspace(*str); str++); + str = skip_spaces(str + 4); if (strcmp(str, "on") == 0) { /* switch on statistics profiling */ dasd_profile_level = DASD_PROFILE_ON; diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c index a482dd7b031..9b3be74cee5 100644 --- a/drivers/video/backlight/lcd.c +++ b/drivers/video/backlight/lcd.c @@ -101,7 +101,7 @@ static ssize_t lcd_store_power(struct device *dev, int power = simple_strtoul(buf, &endp, 0); size_t size = endp - buf; - if (*endp && isspace(*endp)) + if (isspace(*endp)) size++; if (size != count) return -EINVAL; @@ -140,7 +140,7 @@ static ssize_t lcd_store_contrast(struct device *dev, int contrast = simple_strtoul(buf, &endp, 0); size_t size = endp - buf; - if (*endp && isspace(*endp)) + if (isspace(*endp)) size++; if (size != count) return -EINVAL; diff --git a/drivers/video/display/display-sysfs.c b/drivers/video/display/display-sysfs.c index 4830b1bf51e..80abbf323b9 100644 --- a/drivers/video/display/display-sysfs.c +++ b/drivers/video/display/display-sysfs.c @@ -67,7 +67,7 @@ static ssize_t display_store_contrast(struct device *dev, contrast = simple_strtoul(buf, &endp, 0); size = endp - buf; - if (*endp && isspace(*endp)) + if (isspace(*endp)) size++; if (size != count) diff --git a/drivers/video/output.c b/drivers/video/output.c index 5e6439ae739..5137aa016b8 100644 --- a/drivers/video/output.c +++ b/drivers/video/output.c @@ -50,7 +50,7 @@ static ssize_t video_output_store_state(struct device *dev, int request_state = simple_strtoul(buf,&endp,0); size_t size = endp - buf; - if (*endp && isspace(*endp)) + if (isspace(*endp)) size++; if (size != count) return -EINVAL; -- cgit