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scsi: aic7xxx: aic79xx: remove VLAs

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In preparation to enabling -Wvla, remove VLAs and replace them with
fixed-length arrays instead.

The arrays fixed here, using the number of constant sections, aren't
really VLAs, but they appear so to the compiler. Replace the array sizes
with a pre-processor-level constant instead using ARRAY_SIZE.

This was prompted by https://lkml.org/lkml/2018/3/7/621

Signed-off-by: Stephen Kitt <steve@sk2.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stephen Kitt 2018-03-08 21:51:58 +01:00 committed by Martin K. Petersen
parent 2e8c3002e3
commit 88b13609af
5 changed files with 11 additions and 14 deletions
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8
drivers/scsi/aic7xxx/aic79xx_core.c
View File

@ -9338,9 +9338,9 @@ ahd_dumpseq(struct ahd_softc* ahd)
static void
ahd_loadseq(struct ahd_softc *ahd)
{
struct cs cs_table[num_critical_sections];
u_int begin_set[num_critical_sections];
u_int end_set[num_critical_sections];
struct cs cs_table[NUM_CRITICAL_SECTIONS];
u_int begin_set[NUM_CRITICAL_SECTIONS];
u_int end_set[NUM_CRITICAL_SECTIONS];
const struct patch *cur_patch;
u_int cs_count;
u_int cur_cs;
@ -9456,7 +9456,7 @@ ahd_loadseq(struct ahd_softc *ahd)
* Move through the CS table until we find a CS
* that might apply to this instruction.
*/
for (; cur_cs < num_critical_sections; cur_cs++) {
for (; cur_cs < NUM_CRITICAL_SECTIONS; cur_cs++) {
if (critical_sections[cur_cs].end <= i) {
if (begin_set[cs_count] == TRUE
&& end_set[cs_count] == FALSE) {

3
drivers/scsi/aic7xxx/aic79xx_seq.h_shipped
View File

@ -1186,5 +1186,4 @@ static const struct cs {
{ 759, 763 }
};
static const int num_critical_sections = sizeof(critical_sections)
/ sizeof(*critical_sections);
#define NUM_CRITICAL_SECTIONS ARRAY_SIZE(critical_sections)

8
drivers/scsi/aic7xxx/aic7xxx_core.c
View File

@ -6848,9 +6848,9 @@ ahc_dumpseq(struct ahc_softc* ahc)
static int
ahc_loadseq(struct ahc_softc *ahc)
{
struct cs cs_table[num_critical_sections];
u_int begin_set[num_critical_sections];
u_int end_set[num_critical_sections];
struct cs cs_table[NUM_CRITICAL_SECTIONS];
u_int begin_set[NUM_CRITICAL_SECTIONS];
u_int end_set[NUM_CRITICAL_SECTIONS];
const struct patch *cur_patch;
u_int cs_count;
u_int cur_cs;
@ -6915,7 +6915,7 @@ ahc_loadseq(struct ahc_softc *ahc)
* Move through the CS table until we find a CS
* that might apply to this instruction.
*/
for (; cur_cs < num_critical_sections; cur_cs++) {
for (; cur_cs < NUM_CRITICAL_SECTIONS; cur_cs++) {
if (critical_sections[cur_cs].end <= i) {
if (begin_set[cs_count] == TRUE
&& end_set[cs_count] == FALSE) {

3
drivers/scsi/aic7xxx/aic7xxx_seq.h_shipped
View File

@ -1304,5 +1304,4 @@ static const struct cs {
{ 875, 877 }
};
static const int num_critical_sections = sizeof(critical_sections)
/ sizeof(*critical_sections);
#define NUM_CRITICAL_SECTIONS ARRAY_SIZE(critical_sections)

3
drivers/scsi/aic7xxx/aicasm/aicasm.c
View File

@ -451,8 +451,7 @@ output_code()
fprintf(ofile, "\n};\n\n");
fprintf(ofile,
"static const int num_critical_sections = sizeof(critical_sections)\n"
" / sizeof(*critical_sections);\n");
"#define NUM_CRITICAL_SECTIONS ARRAY_SIZE(critical_sections)\n");
fprintf(stderr, "%s: %d instructions used\n", appname, instrcount);
}