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authorPaul Gortmaker <paul.gortmaker@windriver.com>2013-06-19 00:23:59 +0200
committerPaul Gortmaker <paul.gortmaker@windriver.com>2013-07-15 01:36:56 +0200
commit148f9bb87745ed45f7a11b2cbd3bc0f017d5d257 (patch)
tree88a21d992eae94a05cc30ddbc2c71465701ec3aa /arch/x86/kernel/head_32.S
parentscore: delete __cpuinit usage from all score files (diff)
downloadlinux-148f9bb87745ed45f7a11b2cbd3bc0f017d5d257.tar.xz
linux-148f9bb87745ed45f7a11b2cbd3bc0f017d5d257.zip
x86: delete __cpuinit usage from all x86 files
The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) are flagged as __cpuinit -- so if we remove the __cpuinit from arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. This removes all the arch/x86 uses of the __cpuinit macros from all C files. x86 only had the one __CPUINIT used in assembly files, and it wasn't paired off with a .previous or a __FINIT, so we can delete it directly w/o any corresponding additional change there. [1] https://lkml.org/lkml/2013/5/20/589 Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'arch/x86/kernel/head_32.S')
-rw-r--r--arch/x86/kernel/head_32.S1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index e65ddc62e113..5dd87a89f011 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -292,7 +292,6 @@ ENDPROC(start_cpu0)
* If cpu hotplug is not supported then this code can go in init section
* which will be freed later
*/
-__CPUINIT
ENTRY(startup_32_smp)
cld
movl $(__BOOT_DS),%eax