vsprintf: use %pR, %pr instead of %pRt, %pRf
Jesse accidentally applied v1 [1] of the patchset instead of v2 [2]. This
is the diff between v1 and v2.
The changes in this patch are:
- tidied vsprintf stack buffer to shrink and compute size more
accurately
- use %pR for decoding and %pr for "raw" (with type and flags) instead
of adding %pRt and %pRf
[1] http://lkml.org/lkml/2009/10/6/491
[2] http://lkml.org/lkml/2009/10/13/441
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index a6e1951..6438cd5 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -624,13 +624,19 @@
.precision = -1,
.flags = SPECIAL | SMALL,
};
- /*
- * room for three actual numbers (decimal or hex), plus
- * "[mem 0x-0x 64bit pref disabled flags 0x]\0"
- */
- char sym[3*3*sizeof(resource_size_t) + 41];
+
+ /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8)
+ * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */
+#define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4)
+#define FLAG_BUF_SIZE (2 * sizeof(res->flags))
+#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]")
+#define RAW_BUF_SIZE sizeof("[mem - flags 0x]")
+ char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+ 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
+
char *p = sym, *pend = sym + sizeof(sym);
int size = -1, addr = 0;
+ int decode = (fmt[0] == 'R') ? 1 : 0;
if (res->flags & IORESOURCE_IO) {
size = IO_RSRC_PRINTK_SIZE;
@@ -641,15 +647,17 @@
}
*p++ = '[';
- if (fmt[1] == 't' || fmt[1] == 'f') {
- if (res->flags & IORESOURCE_IO)
- p = string(p, pend, "io ", str_spec);
- else if (res->flags & IORESOURCE_MEM)
- p = string(p, pend, "mem ", str_spec);
- else if (res->flags & IORESOURCE_IRQ)
- p = string(p, pend, "irq ", str_spec);
- else if (res->flags & IORESOURCE_DMA)
- p = string(p, pend, "dma ", str_spec);
+ if (res->flags & IORESOURCE_IO)
+ p = string(p, pend, "io ", str_spec);
+ else if (res->flags & IORESOURCE_MEM)
+ p = string(p, pend, "mem ", str_spec);
+ else if (res->flags & IORESOURCE_IRQ)
+ p = string(p, pend, "irq ", str_spec);
+ else if (res->flags & IORESOURCE_DMA)
+ p = string(p, pend, "dma ", str_spec);
+ else {
+ p = string(p, pend, "??? ", str_spec);
+ decode = 0;
}
hex_spec.field_width = size;
p = number(p, pend, res->start, addr ? hex_spec : dec_spec);
@@ -657,21 +665,19 @@
*p++ = '-';
p = number(p, pend, res->end, addr ? hex_spec : dec_spec);
}
- if (fmt[1] == 't' || fmt[1] == 'f') {
+ if (decode) {
if (res->flags & IORESOURCE_MEM_64)
p = string(p, pend, " 64bit", str_spec);
if (res->flags & IORESOURCE_PREFETCH)
p = string(p, pend, " pref", str_spec);
if (res->flags & IORESOURCE_DISABLED)
p = string(p, pend, " disabled", str_spec);
- if (fmt[1] == 'f') {
- p = string(p, pend, " flags ", str_spec);
- p = number(p, pend, res->flags & ~IORESOURCE_TYPE_BITS,
- flag_spec);
- }
+ } else {
+ p = string(p, pend, " flags ", str_spec);
+ p = number(p, pend, res->flags, flag_spec);
}
*p++ = ']';
- *p = 0;
+ *p = '\0';
return string(buf, end, sym, spec);
}
@@ -847,10 +853,8 @@
* - 'f' For simple symbolic function names without offset
* - 'S' For symbolic direct pointers with offset
* - 's' For symbolic direct pointers without offset
- * - 'R' For a struct resource pointer, print:
- * R address range only ([0x0-0x1f])
- * Rt type and range ([mem 0x0-0x1f 64bit pref])
- * Rf type, range, and flags ([mem 0x0-0x1f 64bit pref flags 0x1])
+ * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
+ * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
* - 'M' For a 6-byte MAC address, it prints the address in the
* usual colon-separated hex notation
* - 'm' For a 6-byte MAC address, it prints the hex address without colons
@@ -881,6 +885,7 @@
case 'S':
return symbol_string(buf, end, ptr, spec, *fmt);
case 'R':
+ case 'r':
return resource_string(buf, end, ptr, spec, fmt);
case 'M': /* Colon separated: 00:01:02:03:04:05 */
case 'm': /* Contiguous: 000102030405 */