diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/backing-dev.c | 50 | ||||
| -rw-r--r-- | mm/page-writeback.c | 14 |
2 files changed, 37 insertions, 27 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index b41823cc05e6..d3ca2b3ee176 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -158,16 +158,16 @@ static ssize_t read_ahead_kb_store(struct device *dev, const char *buf, size_t count) { struct backing_dev_info *bdi = dev_get_drvdata(dev); - char *end; unsigned long read_ahead_kb; - ssize_t ret = -EINVAL; + ssize_t ret; - read_ahead_kb = simple_strtoul(buf, &end, 10); - if (*buf && (end[0] == '\0' || (end[0] == '\n' && end[1] == '\0'))) { - bdi->ra_pages = read_ahead_kb >> (PAGE_SHIFT - 10); - ret = count; - } - return ret; + ret = kstrtoul(buf, 10, &read_ahead_kb); + if (ret < 0) + return ret; + + bdi->ra_pages = read_ahead_kb >> (PAGE_SHIFT - 10); + + return count; } #define K(pages) ((pages) << (PAGE_SHIFT - 10)) @@ -187,16 +187,17 @@ static ssize_t min_ratio_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct backing_dev_info *bdi = dev_get_drvdata(dev); - char *end; unsigned int ratio; - ssize_t ret = -EINVAL; + ssize_t ret; + + ret = kstrtouint(buf, 10, &ratio); + if (ret < 0) + return ret; + + ret = bdi_set_min_ratio(bdi, ratio); + if (!ret) + ret = count; - ratio = simple_strtoul(buf, &end, 10); - if (*buf && (end[0] == '\0' || (end[0] == '\n' && end[1] == '\0'))) { - ret = bdi_set_min_ratio(bdi, ratio); - if (!ret) - ret = count; - } return ret; } BDI_SHOW(min_ratio, bdi->min_ratio) @@ -205,16 +206,17 @@ static ssize_t max_ratio_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct backing_dev_info *bdi = dev_get_drvdata(dev); - char *end; unsigned int ratio; - ssize_t ret = -EINVAL; + ssize_t ret; + + ret = kstrtouint(buf, 10, &ratio); + if (ret < 0) + return ret; + + ret = bdi_set_max_ratio(bdi, ratio); + if (!ret) + ret = count; - ratio = simple_strtoul(buf, &end, 10); - if (*buf && (end[0] == '\0' || (end[0] == '\n' && end[1] == '\0'))) { - ret = bdi_set_max_ratio(bdi, ratio); - if (!ret) - ret = count; - } return ret; } BDI_SHOW(max_ratio, bdi->max_ratio) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 5ad5ce23c1e0..830893b2b3c7 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1602,10 +1602,18 @@ void writeback_set_ratelimit(void) } static int __cpuinit -ratelimit_handler(struct notifier_block *self, unsigned long u, void *v) +ratelimit_handler(struct notifier_block *self, unsigned long action, + void *hcpu) { - writeback_set_ratelimit(); - return NOTIFY_DONE; + + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_ONLINE: + case CPU_DEAD: + writeback_set_ratelimit(); + return NOTIFY_OK; + default: + return NOTIFY_DONE; + } } static struct notifier_block __cpuinitdata ratelimit_nb = { |