linuxkpi: Add sysfs_emit()
Reviewed by: manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D38086
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@ -37,6 +37,7 @@
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#include <linux/kobject.h>
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#include <linux/stringify.h>
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#include <linux/mm.h>
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struct sysfs_ops {
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ssize_t (*show)(struct kobject *, struct attribute *, char *);
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@ -295,6 +296,24 @@ sysfs_streq(const char *s1, const char *s2)
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return (l1 == l2 && strncmp(s1, s2, l1) == 0);
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}
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static inline int
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sysfs_emit(char *buf, const char *fmt, ...)
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{
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va_list args;
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int i;
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if (!buf || offset_in_page(buf)) {
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pr_warn("invalid sysfs_emit: buf:%p\n", buf);
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return (0);
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}
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va_start(args, fmt);
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i = vscnprintf(buf, PAGE_SIZE, fmt, args);
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va_end(args);
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return (i);
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}
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#define sysfs_attr_init(attr) do {} while(0)
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#endif /* _LINUXKPI_LINUX_SYSFS_H_ */
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