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Patch "kaiser: cleanups while trying for gold link" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Jan 3, 2018

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Stable branch x86 Generic include/asm header files Per-CPU memory allocator
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This is a note to let you know that I've just added the patch titled

kaiser: cleanups while trying for gold link

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kaiser-cleanups-while-trying-for-gold-link.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Wed Jan 3 20:37:21 CET 2018

From: Hugh Dickins <[email protected]>
Date: Mon, 21 Aug 2017 20:11:43 -0700
Subject: kaiser: cleanups while trying for gold link

From: Hugh Dickins <[email protected]>

While trying to get our gold link to work, four cleanups:
matched the gdt_page declaration to its definition;
in fiddling unsuccessfully with PERCPU_INPUT(), lined up backslashes; lined up the backslashes according to convention in percpu-defs.h; deleted the unused irq_stack_pointer addition to irq_stack_union.

Sad to report that aligning backslashes does not appear to help gold align to 8192: but while these did not help, they are worth keeping.

Signed-off-by Hugh Dickins <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 arch/x86/include/asm/desc.h       |    2 +-
 arch/x86/include/asm/processor.h  |    5 -----
 include/asm-generic/vmlinux.lds.h |   18 ++++++++----------
 include/linux/percpu-defs.h       |   24 ++++++++++++------------
 4 files changed, 21 insertions(+), 28 deletions(-)
arch/x86/include/asm/desc.h +1 -1
@@ -43,7 +43,7 @@ struct gdt_page {
 	struct desc_struct gdt[GDT_ENTRIES];
 } __attribute__((aligned(PAGE_SIZE)));
 
-DECLARE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page);
+DECLARE_PER_CPU_PAGE_ALIGNED_USER_MAPPED(struct gdt_page, gdt_page);
 
 static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {
arch/x86/include/asm/processor.h +0 -5
@@ -335,11 +335,6 @@ union irq_stack_union {
 		char gs_base[40];
 		unsigned long stack_canary;
 	};
-
-	struct {
-		char irq_stack_pointer[64];
-		char unused[IRQ_STACK_SIZE - 64];
-	};
 };
 
 DECLARE_PER_CPU_FIRST(union irq_stack_union, irq_stack_union) __visible;
include/asm-generic/vmlinux.lds.h +8 -10
@@ -778,16 +778,14 @@
  */
 #define PERCPU_INPUT(cacheline)						\
 	VMLINUX_SYMBOL(__per_cpu_start) = .;				\
-	\
-	VMLINUX_SYMBOL(__per_cpu_user_mapped_start) = .;        \
-	*(.data..percpu..first)           \
-	. = 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) = .;        \
-	\
+	VMLINUX_SYMBOL(__per_cpu_user_mapped_start) = .;		\
+	*(.data..percpu..first)						\
+	. = 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)					\
 	. = ALIGN(cacheline);						\
include/linux/percpu-defs.h +12 -12
@@ -121,10 +121,10 @@
 #define DEFINE_PER_CPU(type, name)					\
 	DEFINE_PER_CPU_SECTION(type, name, "")
 
-#define DECLARE_PER_CPU_USER_MAPPED(type, name)         \
+#define DECLARE_PER_CPU_USER_MAPPED(type, name)				\
 	DECLARE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION)
 
-#define DEFINE_PER_CPU_USER_MAPPED(type, name)          \
+#define DEFINE_PER_CPU_USER_MAPPED(type, name)				\
 	DEFINE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION)
 
 /*

@@ -156,11 +156,11 @@
 	DEFINE_PER_CPU_SECTION(type, name, PER_CPU_SHARED_ALIGNED_SECTION) \
 	____cacheline_aligned_in_smp
 
-#define DECLARE_PER_CPU_SHARED_ALIGNED_USER_MAPPED(type, name)			\
+#define DECLARE_PER_CPU_SHARED_ALIGNED_USER_MAPPED(type, name)		\
 	DECLARE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION PER_CPU_SHARED_ALIGNED_SECTION) \
 	____cacheline_aligned_in_smp
 
-#define DEFINE_PER_CPU_SHARED_ALIGNED_USER_MAPPED(type, name)			\
+#define DEFINE_PER_CPU_SHARED_ALIGNED_USER_MAPPED(type, name)		\
 	DEFINE_PER_CPU_SECTION(type, name, USER_MAPPED_SECTION PER_CPU_SHARED_ALIGNED_SECTION) \
 	____cacheline_aligned_in_smp
 

@@ -185,18 +185,18 @@
 /*
  * 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)
+#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.
  */
-#define DECLARE_PER_CPU_READ_MOSTLY(type, name)			\
+#define DECLARE_PER_CPU_READ_MOSTLY(type, name)				\
 	DECLARE_PER_CPU_SECTION(type, name, "..read_mostly")
 
 #define DEFINE_PER_CPU_READ_MOSTLY(type, name)				\

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/kaiser-vmstat-show-nr_kaisertable-as-nr_overhead.patch queue-4.9/kaiser-add-nokaiser-boot-option-using-alternative.patch queue-4.9/kaiser-fix-unlikely-error-in-alloc_ldt_struct.patch queue-4.9/kaiser-kaiser_flush_tlb_on_return_to_user-check-pcid.patch queue-4.9/x86-paravirt-dont-patch-flush_tlb_single.patch queue-4.9/kaiser-merged-update.patch queue-4.9/kaiser-delete-kaiser_real_switch-option.patch queue-4.9/kaiser-kaiser_remove_mapping-move-along-the-pgd.patch queue-4.9/kaiser-fix-perf-crashes.patch queue-4.9/kaiser-drop-is_atomic-arg-to-kaiser_pagetable_walk.patch queue-4.9/kaiser-load_new_mm_cr3-let-switch_user_cr3-flush-user.patch queue-4.9/kaiser-enhanced-by-kernel-and-user-pcids.patch queue-4.9/kaiser-x86_cr3_pcid_noflush-and-x86_cr3_pcid_user.patch queue-4.9/kaiser-align-addition-to-x86-mm-makefile.patch queue-4.9/kaiser-use-alternative-instead-of-x86_cr3_pcid_noflush.patch queue-4.9/kaiser-stack-map-page_size-at-thread_size-page_size.patch queue-4.9/kaiser-name-that-0x1000-kaiser_shadow_pgd_offset.patch queue-4.9/kaiser-fix-regs-to-do_nmi-ifndef-config_kaiser.patch queue-4.9/kaiser-do-not-set-_page_nx-on-pgd_none.patch queue-4.9/kaiser-tidied-up-asm-kaiser.h-somewhat.patch queue-4.9/kaiser-cleanups-while-trying-for-gold-link.patch queue-4.9/kaiser-tidied-up-kaiser_add-remove_mapping-slightly.patch queue-4.9/kaiser-fix-build-and-fixme-in-alloc_ldt_struct.patch queue-4.9/kaiser-kernel-address-isolation.patch queue-4.9/kaiser-enomem-if-kaiser_pagetable_walk-null.patch queue-4.9/kaiser-asm-tlbflush.h-handle-nopge-at-lower-level.patch queue-4.9/kaiser-paranoid_entry-pass-cr3-need-to-paranoid_exit.patch queue-4.9/kaiser-kaiser-depends-on-smp.patch queue-4.9/kaiser-pcid-0-for-kernel-and-128-for-user.patch