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ARM: vmlinux.lds.S: replace open coded .data sections with generic macros

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Our .data section is missing PAGE_ALIGNED_DATA() which contains,
amongst other things, the vdso page. This creates a System.map that
looks like this:

c15769a8 D _edata
c1577000 d vdso_data_store
c1578000 D __start___bug_table
c1580544 D __stop___bug_table
c1580544 B __bss_start

By using RW_DATA_SECTION() we pick whatever generic sections might be
added in the future and have page-aligned data next to other strongly
aligned data. Furthermore we now include the entire thing, including the
bug table, in the data accounting surrounded by _sdata/_edata.

While at it let's also remplace the open coded .init.data by its
equivalent INIT_DATA_SECTION().

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
This commit is contained in:
Nicolas Pitre 2017-08-29 16:33:57 -04:00
parent 88cac29f42
commit 861e37da6a
1 changed files with 6 additions and 32 deletions
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38
arch/arm/kernel/vmlinux.lds.S
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@ -214,14 +214,9 @@ SECTIONS
*(.pv_table) *(.pv_table)
__pv_table_end = .; __pv_table_end = .;
} }
.init.data : {
INIT_DATA INIT_DATA_SECTION(16)
INIT_SETUP(16)
INIT_CALLS
CON_INITCALL
SECURITY_INITCALL
INIT_RAM_FS
}
.exit.data : { .exit.data : {
ARM_EXIT_KEEP(EXIT_DATA) ARM_EXIT_KEEP(EXIT_DATA)
} }
@ -237,30 +232,9 @@ SECTIONS
#endif #endif
__init_end = .; __init_end = .;
.data : { _sdata = .;
_data = .; /* address in memory */ RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
_sdata = .; _edata = .;
/*
* first, the init task union, aligned
* to an 8192 byte boundary.
*/
INIT_TASK_DATA(THREAD_SIZE)
NOSAVE_DATA
CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
READ_MOSTLY_DATA(L1_CACHE_BYTES)
/*
* and the usual data section
*/
DATA_DATA
CONSTRUCTORS
_edata = .;
}
BUG_TABLE
#ifdef CONFIG_HAVE_TCM #ifdef CONFIG_HAVE_TCM
/* /*