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Commit 676c0dbe authored by Paul Mundt's avatar Paul Mundt Committed by Frederic Weisbecker
Browse files

ksym_tracer: Support read accesses independent of read/write. 



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: default avatarPaul 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: default avatarFrederic Weisbecker <fweisbec@gmail.com>
parent 30ff21e3

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;