x86/apic/uv: silence a shift wrapping warning

Commit-ID:  c4597fd756836a5fb7900f2091797ab564390ad0
Gitweb:     http://git.kernel.org/tip/c4597fd756836a5fb7900f2091797ab564390ad0
Author:     Dan Carpenter <[email protected]>
AuthorDate: Thu, 24 Nov 2016 01:19:08 +0300
Committer:  Ingo Molnar <[email protected]>
CommitDate: Thu, 24 Nov 2016 06:01:05 +0100

x86/apic/uv: Silence a shift wrapping warning

'm_io' is stored in 6 bits so it's a number in the 0-63 range. Static analysis tools complain that 1 << 63 will wrap so I have changed it to 1ULL << m_io.

This code is over three years old so presumably the bug doesn't happen very frequently in real life or someone would have complained by now.

---
 arch/x86/kernel/apic/x2apic_uv_x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index aeef53c..35690a1 100644
@@ -815,9 +815,9 @@ static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
 				l = li;
 			}
 			addr1 = (base << shift) +
-				f * (unsigned long)(1 << m_io);
+				f * (1ULL << m_io);
 			addr2 = (base << shift) +
-				(l + 1) * (unsigned long)(1 << m_io);
+				(l + 1) * (1ULL << m_io);
 			pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
 				id, fi, li, lnasid, addr1, addr2);
 			if (max_io < l)