The patch titled
Subject: sections: disable const sections for PA-RISC v2
has been removed from the -mm tree. Its filename was
sections-disable-const-sections-for-pa-risc-v2.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Subject: sections: disable const sections for PA-RISC v2
The PA-RISC tool chain seems to have some problem with correct read/write
attributes on sections. This causes problems when the const sections
are fixed up for other architecture to only contain truly read-only
data.
Disable const sections for PA-RISC
This can cause a bit of noise with modpost.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/parisc/Kconfig | 1 +
include/linux/init.h | 27 +++++++++++++++++++--------
init/Kconfig | 6 ++++++
3 files changed, 26 insertions(+), 8 deletions(-)
diff -puN arch/parisc/Kconfig~sections-disable-const-sections-for-pa-risc-v2 arch/parisc/Kconfig
--- a/arch/parisc/Kconfig~sections-disable-const-sections-for-pa-risc-v2
+++ a/arch/parisc/Kconfig
@@ -13,6 +13,7 @@ config PARISC
select HAVE_PERF_EVENTS
select GENERIC_ATOMIC64 if !64BIT
select HAVE_GENERIC_HARDIRQS
+ select BROKEN_RODATA
select GENERIC_IRQ_PROBE
select GENERIC_PCI_IOMAP
select IRQ_PER_CPU
diff -puN include/linux/init.h~sections-disable-const-sections-for-pa-risc-v2 include/linux/init.h
--- a/include/linux/init.h~sections-disable-const-sections-for-pa-risc-v2
+++ a/include/linux/init.h
@@ -43,11 +43,22 @@
discard it in modules) */
#define __init __section(.init.text) __cold notrace
#define __initdata __section(.init.data)
-#define __initconst __section(.init.rodata)
+#define __initconst __constsection(.init.rodata)
#define __exitdata __section(.exit.data)
#define __exit_call __used __section(.exitcall.exit)
/*
+ * Some architecture have tool chains which do not handle rodata attributes
+ * correctly. For those disable special sections for const, so that other
+ * architectures can annotate correctly.
+ */
+#ifdef CONFIG_BROKEN_RODATA
+#define __constsection(x)
+#else
+#define __constsection(x) __section(x)
+#endif
+
+/*
* modpost check for section mismatches during the kernel build.
* A section mismatch happens when there are references from a
* code or data section to an init section (both code or data).
@@ -66,7 +77,7 @@
*/
#define __ref __section(.ref.text) noinline
#define __refdata __section(.ref.data)
-#define __refconst __section(.ref.rodata)
+#define __refconst __constsection(.ref.rodata)
/* compatibility defines */
#define __init_refok __ref
@@ -85,26 +96,26 @@
/* Used for HOTPLUG */
#define __devinit __section(.devinit.text) __cold notrace
#define __devinitdata __section(.devinit.data)
-#define __devinitconst __section(.devinit.rodata)
+#define __devinitconst __constsection(.devinit.rodata)
#define __devexit __section(.devexit.text) __exitused __cold notrace
#define __devexitdata __section(.devexit.data)
-#define __devexitconst __section(.devexit.rodata)
+#define __devexitconst __constsection(.devexit.rodata)
/* Used for HOTPLUG_CPU */
#define __cpuinit __section(.cpuinit.text) __cold notrace
#define __cpuinitdata __section(.cpuinit.data)
-#define __cpuinitconst __section(.cpuinit.rodata)
+#define __cpuinitconst __constsection(.cpuinit.rodata)
#define __cpuexit __section(.cpuexit.text) __exitused __cold notrace
#define __cpuexitdata __section(.cpuexit.data)
-#define __cpuexitconst __section(.cpuexit.rodata)
+#define __cpuexitconst __constsection(.cpuexit.rodata)
/* Used for MEMORY_HOTPLUG */
#define __meminit __section(.meminit.text) __cold notrace
#define __meminitdata __section(.meminit.data)
-#define __meminitconst __section(.meminit.rodata)
+#define __meminitconst __constsection(.meminit.rodata)
#define __memexit __section(.memexit.text) __exitused __cold notrace
#define __memexitdata __section(.memexit.data)
-#define __memexitconst __section(.memexit.rodata)
+#define __memexitconst __constsection(.memexit.rodata)
/* For assembly routines */
#define __HEAD .section ".head.text","ax"
diff -puN init/Kconfig~sections-disable-const-sections-for-pa-risc-v2 init/Kconfig
--- a/init/Kconfig~sections-disable-const-sections-for-pa-risc-v2
+++ a/init/Kconfig
@@ -1581,4 +1581,10 @@ config PADATA
depends on SMP
bool
+# Can be selected by architectures with broken toolchains
+# that get confused by correct const<->read_only section
+# mappings
+config BROKEN_RODATA
+ bool
+
source "kernel/Kconfig.locks"
_
Patches currently in -mm which might be from ak@xxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
thp-x86-introduce-have_arch_transparent_hugepage.patch
thp-remove-assumptions-on-pgtable_t-type.patch
thp-introduce-pmdp_invalidate.patch
thp-make-madv_hugepage-check-for-mm-def_flags.patch
thp-s390-thp-splitting-backend-for-s390.patch
thp-s390-thp-pagetable-pre-allocation-for-s390.patch
thp-s390-disable-thp-for-kvm-host-on-s390.patch
thp-s390-architecture-backend-for-thp-on-s390.patch
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