linux-kernel - [PATCH 1/2] x86/mm/kaiser: Remove unused user-mapped page-aligned section

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Date:   Mon, 27 Nov 2017 22:10:12 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...hat.com>, daniel.gruss@...k.tugraz.at,
        hughd@...gle.com, keescook@...gle.com, linux-mm@...ck.org,
        michael.schwarz@...k.tugraz.at, moritz.lipp@...k.tugraz.at,
        richard.fellner@...dent.tugraz.at
Subject: [PATCH 1/2] x86/mm/kaiser: Remove unused user-mapped page-aligned section

The '.data..percpu..user_mapped..page_aligned' section isn't used
anywhere.  Remove it and its related macros.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
---
 include/asm-generic/vmlinux.lds.h |  2 --
 include/linux/percpu-defs.h       | 10 ----------
 2 files changed, 12 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index e12168936d3f..386f8846d9e9 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -831,8 +831,6 @@
 	. = ALIGN(cacheline);						\
 	*(.data..percpu..user_mapped)					\
 	*(.data..percpu..user_mapped..shared_aligned)			\
-	. = ALIGN(PAGE_SIZE);						\
-	*(.data..percpu..user_mapped..page_aligned)			\
 	VMLINUX_SYMBOL(__per_cpu_user_mapped_end) = .;			\
 	. = ALIGN(PAGE_SIZE);						\
 	*(.data..percpu..page_aligned)					\
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 752513674295..40ea19ccf1ec 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -182,16 +182,6 @@
 #define DEFINE_PER_CPU_PAGE_ALIGNED(type, name)				\
 	DEFINE_PER_CPU_SECTION(type, name, "..page_aligned")		\
 	__aligned(PAGE_SIZE)
-/*
- * Declaration/definition used for per-CPU variables that must be page aligned and need to be mapped in user mode.
- */
-#define DECLARE_PER_CPU_PAGE_ALIGNED_USER_MAPPED(type, name)		\
-	DECLARE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION"..page_aligned") \
-	__aligned(PAGE_SIZE)
-
-#define DEFINE_PER_CPU_PAGE_ALIGNED_USER_MAPPED(type, name)		\
-	DEFINE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION"..page_aligned") \
-	__aligned(PAGE_SIZE)
 
 /*
  * Declaration/definition used for per-CPU variables that must be read mostly.
-- 
2.13.6