This patch series cleans up the section names on the m68k
architecture. It requires the architecture-independent macro
definitions from this patch series:
<http://www.spinics.net/lists/mips/msg33499.html>
The long-term goal here is to add support for building the kernel with
-ffunction-sections -fdata-sections. This requires renaming all the
magic section names in the kernel of the form .text.foo, .data.foo,
.bss.foo, and .rodata.foo to not have collisions with sections
generated for code like:
static int nosave = 0; /* -fdata-sections places in .data.nosave */
static void head(); /* -ffunction-sections places in .text.head */
Note that these patches have not been boot-tested (aside from testing
the analogous changes on x86), since I don't have access to the
appropriate hardware.
-Tim Abbott
Tim Abbott (2):
m68k: use new macro for .data.cacheline_aligned section.
m68k: use new macros for .data.init_task.
arch/m68k/kernel/process.c | 4 ++--
arch/m68k/kernel/vmlinux-std.lds | 7 ++-----
arch/m68k/kernel/vmlinux-sun3.lds | 2 +-
3 files changed, 5 insertions(+), 8 deletions(-)
.data.init_task should not need a separate output section; this change
moves it into the .data section.
I changed the aligment in both linker scripts to be THREAD_SIZE from
8192 and PAGE_SIZE, respectively. I'd like an ack from one of the
m68k maintainers that this is right.
Signed-off-by: Tim Abbott <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Roman Zippel <[email protected]>
Cc: [email protected]
---
arch/m68k/kernel/process.c | 4 ++--
arch/m68k/kernel/vmlinux-std.lds | 3 +--
arch/m68k/kernel/vmlinux-sun3.lds | 2 +-
3 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index ec37fb5..6bf2cac 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -46,8 +46,8 @@ struct mm_struct init_mm = INIT_MM(init_mm);
EXPORT_SYMBOL(init_mm);
-union thread_union init_thread_union
-__attribute__((section(".data.init_task"), aligned(THREAD_SIZE)))
+union thread_union init_thread_union __init_task_data
+__attribute__((aligned(THREAD_SIZE)))
= { INIT_THREAD_INFO(init_task) };
/* initial task structure */
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index ac800bc..9e3cd1d 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -30,6 +30,7 @@ SECTIONS
RODATA
.data : { /* Data */
+ INIT_TASK_DATA(THREAD_SIZE)
CACHELINE_ALIGNED_DATA(16)
DATA_DATA
CONSTRUCTORS
@@ -76,8 +77,6 @@ SECTIONS
. = ALIGN(8192);
__init_end = .;
- .data.init_task : { *(.data.init_task) } /* The initial task and kernel stack */
-
_end = . ;
/* Sections to be discarded */
diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds
index c192f77..8a988db 100644
--- a/arch/m68k/kernel/vmlinux-sun3.lds
+++ b/arch/m68k/kernel/vmlinux-sun3.lds
@@ -24,6 +24,7 @@ SECTIONS
_etext = .; /* End of text section */
.data : { /* Data */
+ INIT_TASK_DATA(THREAD_SIZE)
DATA_DATA
CONSTRUCTORS
. = ALIGN(16); /* Exception table */
@@ -70,7 +71,6 @@ __init_begin = .;
#endif
. = ALIGN(PAGE_SIZE);
__init_end = .;
- .data.init.task : { *(.data.init_task) }
.bss : { *(.bss) } /* BSS */
--
1.6.2.1
.data.cacheline_aligned should not need a separate output section;
this change moves it into the .data section.
Signed-off-by: Tim Abbott <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Roman Zippel <[email protected]>
Cc: [email protected]
---
arch/m68k/kernel/vmlinux-std.lds | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 01d212b..ac800bc 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -30,13 +30,11 @@ SECTIONS
RODATA
.data : { /* Data */
+ CACHELINE_ALIGNED_DATA(16)
DATA_DATA
CONSTRUCTORS
}
- . = ALIGN(16);
- .data.cacheline_aligned : { *(.data.cacheline_aligned) }
-
.bss : { *(.bss) } /* BSS */
_edata = .; /* End of data section */
--
1.6.2.1