misc: sgi-gru: use explicitly signed char

With char becoming unsigned by default, and with `char` alone being
ambiguous and based on architecture, signed chars need to be marked
explicitly as such. This fixes warnings like:

drivers/misc/sgi-gru/grumain.c:711 gru_check_chiplet_assignment() warn: 'gts->ts_user_chiplet_id' is unsigned

Cc: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20221025025223.573543-1-Jason@zx2c4.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 9afda47efbf2..6706ef3c5977 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -152,7 +152,7 @@ static int gru_assign_asid(struct gru_state *gru)
  * Optionally, build an array of chars that contain the bit numbers allocated.
  */
 static unsigned long reserve_resources(unsigned long *p, int n, int mmax,
-				       char *idx)
+				       signed char *idx)
 {
 	unsigned long bits = 0;
 	int i;
@@ -170,14 +170,14 @@ static unsigned long reserve_resources(unsigned long *p, int n, int mmax,
 }
 
 unsigned long gru_reserve_cb_resources(struct gru_state *gru, int cbr_au_count,
-				       char *cbmap)
+				       signed char *cbmap)
 {
 	return reserve_resources(&gru->gs_cbr_map, cbr_au_count, GRU_CBR_AU,
 				 cbmap);
 }
 
 unsigned long gru_reserve_ds_resources(struct gru_state *gru, int dsr_au_count,
-				       char *dsmap)
+				       signed char *dsmap)
 {
 	return reserve_resources(&gru->gs_dsr_map, dsr_au_count, GRU_DSR_AU,
 				 dsmap);