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selftests: cachestat: Fix warning on declaration under label

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Fix warning caused from declaration under a case label. The proper way
is to declare variable at the beginning of the function. The warning
came from running clang using LLVM=1; and is as follows:

-test_cachestat.c:260:3: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
  260 |                 char *map = mmap(NULL, filesize, PROT_READ | PROT_WRITE,
      |

Link: https://lore.kernel.org/r/20250929115405.25695-2-sidharthseela@gmail.com
Signed-off-by: Sidharth Seela <sidharthseela@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Reviewed-by: wang lian <lianux.mm@gmail.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Sidharth Seela 2025-09-29 17:24:06 +05:30 committed by Shuah Khan
parent b90cafb438
commit 920aa3a770
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/cachestat/test_cachestat.c
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@ -226,7 +226,7 @@ bool run_cachestat_test(enum file_type type)
int syscall_ret;
size_t compute_len = PS * 512;
struct cachestat_range cs_range = { PS, compute_len };
char *filename = "tmpshmcstat";
char *filename = "tmpshmcstat", *map;
struct cachestat cs;
bool ret = true;
int fd;
@ -257,7 +257,7 @@ bool run_cachestat_test(enum file_type type)
}
break;
case FILE_MMAP:
char *map = mmap(NULL, filesize, PROT_READ | PROT_WRITE,
map = mmap(NULL, filesize, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if (map == MAP_FAILED) {