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Linux: Fix 32-bit vDSO for clock_gettime on powerpc32

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When the clock_id is CLOCK_PROCESS_CPUTIME_ID or CLOCK_THREAD_CPUTIME_ID,
on the 5.10 kernel powerpc 32-bit, the 32-bit vDSO is executed successfully (
because the __kernel_clock_gettime in arch/powerpc/kernel/vdso32/gettimeofday.S
does not support these two IDs, the 32-bit time_t syscall will be used),
but tp32.tv_sec is equal to 0, causing the 64-bit time_t syscall to continue to be used,
resulting in two system calls.

Fix commit 72e84d1db2.

Signed-off-by: maminjie  <maminjie2@huawei.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
maminjie 2021-12-20 19:36:32 +08:00 committed by Adhemerval Zanella
parent de8a0897e3
commit e0fc721ce6
1 changed files with 1 additions and 1 deletions
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2
sysdeps/unix/sysv/linux/clock_gettime.c
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@ -53,7 +53,7 @@ __clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp)
{
struct timespec tp32;
r = INTERNAL_VSYSCALL_CALL (vdso_time, 2, clock_id, &tp32);
if (r == 0 && tp32.tv_sec > 0)
if (r == 0 && tp32.tv_sec >= 0)
{
*tp = valid_timespec_to_timespec64 (tp32);
return 0;