drivers/firmware: const-ify DMI API and internals
Three main sets of changes:
1) dmi_get_system_info() return value should have been marked const,
since callers should not be changing that data.
2) const-ify DMI internals, since DMI firmware tables should,
whenever possible, be marked const to ensure we never ever write to
that data area.
3) const-ify DMI API, to enable marking tables const where possible
in low-level drivers.
And if we're really lucky, this might enable some additional
optimizations on the part of the compiler.
The bulk of the changes are #2 and #3, which are interrelated. #1 could
have been a separate patch, but it was so small compared to the others,
it was easier to roll it into this changeset.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 0289705..cd40641 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -98,9 +98,9 @@
unsigned int edi __attribute__ ((packed));
};
-static inline char *i8k_get_dmi_data(int field)
+static inline const char *i8k_get_dmi_data(int field)
{
- char *dmi_data = dmi_get_system_info(field);
+ const char *dmi_data = dmi_get_system_info(field);
return dmi_data && *dmi_data ? dmi_data : "?";
}