ksym_tracer: Support read accesses independent of read/write. (676c0dbe) · Commits · 戴 / test

All of the infrastructure already exists to support read accesses for platforms that support a read access independently of read/write (such as in the case of the SuperH UBC). This just trivially hooks up the read case by itself. Signed-off-by:

Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Prasad <prasad@linux.vnet.ibm.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jan Kiszka <jan.kiszka@web.de> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Avi Kivity <avi@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Arjan van de Ven <arjan@linux.intel.com> LKML-Reference: <20091109083733.GA25848@linux-sh.org> Signed-off-by:

Frederic Weisbecker <fweisbec@gmail.com>

kernel/trace/trace_ksym.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -136,6 +136,7 @@ static int ksym_trace_get_access_type(char *str)
		access \|= HW_BREAKPOINT_X;

		switch (access) {
		case HW_BREAKPOINT_R:
		case HW_BREAKPOINT_W:
		case HW_BREAKPOINT_W \| HW_BREAKPOINT_R:
		return access;
		@@ -239,7 +240,9 @@ static ssize_t ksym_trace_filter_read(struct file filp, char __user ubuf,

		hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) {
		ret = trace_seq_printf(s, "%pS:", (void *)entry->ksym_addr);
		if (entry->type == HW_BREAKPOINT_W)
		if (entry->type == HW_BREAKPOINT_R)
		ret = trace_seq_puts(s, "r--\n");
		else if (entry->type == HW_BREAKPOINT_W)
		ret = trace_seq_puts(s, "-w-\n");
		else if (entry->type == (HW_BREAKPOINT_W \| HW_BREAKPOINT_R))
		ret = trace_seq_puts(s, "rw-\n");
		@@ -414,6 +417,9 @@ static enum print_line_t ksym_trace_output(struct trace_iterator *iter)
		return TRACE_TYPE_PARTIAL_LINE;

		switch (field->type) {
		case HW_BREAKPOINT_R:
		ret = trace_seq_printf(s, " R ");
		break;
		case HW_BREAKPOINT_W:
		ret = trace_seq_printf(s, " W ");
		break;
		@@ -488,6 +494,9 @@ static int ksym_tracer_stat_show(struct seq_file m, void v)
		access_type = entry->type;

		switch (access_type) {
		case HW_BREAKPOINT_R:
		seq_puts(m, " R ");
		break;
		case HW_BREAKPOINT_W:
		seq_puts(m, " W ");
		break;

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