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authorChris Metcalf <cmetcalf@tilera.com>2013-08-07 23:33:32 +0400
committerChris Metcalf <cmetcalf@tilera.com>2013-08-14 00:26:21 +0400
commit4a556f4f56da3110b27e265b79f0e7582115445c (patch)
treef5af0b865c867160855e4722b49d7e850dddf944 /arch/tile/Kconfig
parent0c1d1917c547c8e787fb58e20e2de577453c980c (diff)
downloadlinux-4a556f4f56da3110b27e265b79f0e7582115445c.tar.xz
tile: implement gettimeofday() via vDSO
This change creates the framework for vDSO calls, makes the existing rt_sigreturn() mechanism use it, and adds a fast gettimeofday(). Now that we need to expose the vDSO address to userspace, we add AT_SYSINFO_EHDR to the set of aux entries provided to userspace. (You can disable any extra vDSO support by booting with vdso=0, but the rt_sigreturn vDSO page will still be provided.) Note that glibc has supported the tile vDSO since release 2.17. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/Kconfig')
-rw-r--r--arch/tile/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 1126b9d2f4cc..7b87318ee690 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -64,6 +64,9 @@ config HUGETLB_SUPER_PAGES
depends on HUGETLB_PAGE && TILEGX
def_bool y
+config GENERIC_TIME_VSYSCALL
+ def_bool y
+
# FIXME: tilegx can implement a more efficient rwsem.
config RWSEM_GENERIC_SPINLOCK
def_bool y