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 * cmd_lock must be acquired before any cmd_info lock.
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 * cmd_lock must be acquired before any cmd_info lock.
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 * When locking two cmd info structures, structure with
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 * When locking two cmd info structures, structure with
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 * lower address must be locked first.
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 * lower address must be locked first.
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 */
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 */
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spinlock_t cmd_lock;    /**< Lock protecting command list. */
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SPINLOCK_INITIALIZE(cmd_lock);  /**< Lock protecting command list. */
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link_t cmd_head;    /**< Command list. */
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link_t cmd_head;        /**< Command list. */
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static cmd_info_t *parse_cmdline(char *cmdline, size_t len);
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static cmd_info_t *parse_cmdline(char *cmdline, size_t len);
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static bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end);
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static bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end);
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static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
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static char history[KCONSOLE_HISTORY][MAX_CMDLINE] = {};
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/** Initialize kconsole data structures. */
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/** Initialize kconsole data structures. */
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void kconsole_init(void)
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void kconsole_init(void)
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{
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{
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    int i;
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    int i;
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    spinlock_initialize(&cmd_lock, "kconsole_cmd");
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    list_initialize(&cmd_head);
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    list_initialize(&cmd_head);
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    cmd_init();
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    cmd_init();
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    for (i=0; i<KCONSOLE_HISTORY; i++)
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    for (i=0; i<KCONSOLE_HISTORY; i++)
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        history[i][0] = '\0';
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        history[i][0] = '\0';