arm64: lse: Pass -fomit-frame-pointer to out-of-line ll/sc atomics
authorWill Deacon <will.deacon@arm.com>
Fri, 9 Feb 2018 13:19:47 +0000 (13:19 +0000)
committerWill Deacon <will.deacon@arm.com>
Tue, 6 Mar 2018 18:52:32 +0000 (18:52 +0000)
commit6b24442d68e78c57c8837920ea5dfb252571847a
tree180962e1b03868090b1232772c3357303d99d240
parent4e829b6735475313016787ec3d256e102167b94d
arm64: lse: Pass -fomit-frame-pointer to out-of-line ll/sc atomics

In cases where x30 is used as a temporary in the out-of-line ll/sc atomics
(e.g. atomic_fetch_add), the compiler tends to put out a full stackframe,
which included pointing the x29 at the new frame.

Since these things aren't traceable anyway, we can pass -fomit-frame-pointer
to reduce the work when spilling. Since this is incompatible with -pg, we
also remove that from the CFLAGS for this file.

Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/lib/Makefile