[Linuxptp-devel] [PATCH 1/2] missing: add SIOCGHWTSTAMP to missing.h

[Jacob K. <jac...@in...>]

In order to allow hwtstamp_ctl to use the non-destructive SIOCGHWTSTAMP
ioctl, we need to add it to missing.h, in order to prevent build failure
on older kernels which don't have this support.

Signed-off-by: Jacob Keller <jac...@in...>
---
 missing.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/missing.h b/missing.h
index d6b2355cb8fb..5f21fe58d069 100644
--- a/missing.h
+++ b/missing.h
@@ -50,6 +50,10 @@ enum _missing_hwtstamp_tx_types {
 };
 #endif
 
+#ifndef SIOCGHWTSTAMP
+#define SIOCGHWTSTAMP 0x89b1
+#endif
+
 #ifndef HAVE_CLOCK_ADJTIME
 static inline int clock_adjtime(clockid_t id, struct timex *tx)
 {
-- 
1.9.0