[tip: timers/core] lib/vdso: Remove VDSO_HAS_32BIT_FALLBACK

[tip-bot2 for Vincenzo Frascino]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     746bc1f8e7efa210881405c52ee3729406fa4e95
Gitweb:        https://git.kernel.org/tip/746bc1f8e7efa210881405c52ee3729406fa4e95
Author:        Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
AuthorDate:    Fri, 30 Aug 2019 14:58:58 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Fri, 10 Jan 2020 21:14:05 +01:00

lib/vdso: Remove VDSO_HAS_32BIT_FALLBACK

VDSO_HAS_32BIT_FALLBACK was introduced to address a regression which
caused seccomp to deny access to the applications to clock_gettime64()
and clock_getres64() because they are not enabled in the existing
filters.

The purpose of VDSO_HAS_32BIT_FALLBACK was to simplify the conditional
implementation of __cvdso_clock_get*time32() variants.

Now that all the architectures that support the generic vDSO library
have been converted to support the 32 bit fallbacks the conditional
can be removed.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20190830135902.20861-5-vincenzo.frascino@xxxxxxx

References: c60a32ea4f45 ("lib/vdso/32: Provide legacy syscall fallbacks")
---
 lib/vdso/gettimeofday.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
index 8e77071..cd3aacf 100644
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -126,13 +126,8 @@ __cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res)
 
 	ret = __cvdso_clock_gettime_common(clock, &ts);
 
-#ifdef VDSO_HAS_32BIT_FALLBACK
 	if (unlikely(ret))
 		return clock_gettime32_fallback(clock, res);
-#else
-	if (unlikely(ret))
-		ret = clock_gettime_fallback(clock, &ts);
-#endif
 
 	if (likely(!ret)) {
 		res->tv_sec = ts.tv_sec;
@@ -242,13 +237,8 @@ __cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res)
 
 	ret = __cvdso_clock_getres_common(clock, &ts);
 
-#ifdef VDSO_HAS_32BIT_FALLBACK
 	if (unlikely(ret))
 		return clock_getres32_fallback(clock, res);
-#else
-	if (unlikely(ret))
-		ret = clock_getres_fallback(clock, &ts);
-#endif
 
 	if (likely(!ret && res)) {
 		res->tv_sec = ts.tv_sec;