This patch (as1515) fixes some unavoidably dumb compiler warnings:
CC [M] drivers/usb/renesas_usbhs/mod.o
In file included from drivers/usb/host/ohci-hcd.c:101:0:
drivers/usb/host/ohci-dbg.c: In function ‘fill_registers_buffer’:
drivers/usb/host/ohci-dbg.c:656:2: warning: the comparison will always evaluate as ‘true’ for the address of ‘next’ will never be NULL [-Waddress]
drivers/usb/host/ohci-dbg.c:675:3: warning: the comparison will always evaluate as ‘true’ for the address of ‘next’ will never be NULL [-Waddress]
Instead of trying to fix the macro to work under all cirumstances,
just add a second macro for use in cases where the "next" argument is
the address of a local variable.
Unfortunately the macro cannot be replaced by a real subroutine,
because there's no va_list version of ohci_dbg() or dev_dbg().
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
---
This fix should go into 3.3-rc2.
drivers/usb/host/ohci-dbg.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
Index: usb-3.3/drivers/usb/host/ohci-dbg.c
===================================================================
--- usb-3.3.orig/drivers/usb/host/ohci-dbg.c
+++ usb-3.3/drivers/usb/host/ohci-dbg.c
@@ -82,6 +82,14 @@ urb_print(struct urb * urb, char * str,
ohci_dbg(ohci,format, ## arg ); \
} while (0);
+/* Version for use where "next" is the address of a local variable */
+#define ohci_dbg_nosw(ohci, next, size, format, arg...) \
+ do { \
+ unsigned s_len; \
+ s_len = scnprintf(*next, *size, format, ## arg); \
+ *size -= s_len; *next += s_len; \
+ } while (0);
+
static void ohci_dump_intr_mask (
struct ohci_hcd *ohci,
@@ -653,7 +661,7 @@ static ssize_t fill_registers_buffer(str
/* dump driver info, then registers in spec order */
- ohci_dbg_sw (ohci, &next, &size,
+ ohci_dbg_nosw(ohci, &next, &size,
"bus %s, device %s\n"
"%s\n"
"%s\n",
@@ -672,7 +680,7 @@ static ssize_t fill_registers_buffer(str
/* hcca */
if (ohci->hcca)
- ohci_dbg_sw (ohci, &next, &size,
+ ohci_dbg_nosw(ohci, &next, &size,
"hcca frame 0x%04x\n", ohci_frame_no(ohci));
/* other registers mostly affect frame timings */
--
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