Messages in this thread Patch in this message | | | Date | Sat, 6 Jan 2007 09:39:07 -0500 | From | Gautham R Shenoy <> | Subject | [PATCH] Change cpu_up and co from __devinit to __cpuinit |
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Compiling the kernel with CONFIG_HOTPLUG = y and CONFIG_HOTPLUG_CPU = n with CONFIG_RELOCATABLE = y generates the following modpost warnings
WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between '_cpu_up' (at offset 0xc0141b7d) and 'cpu_up' WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between '_cpu_up' (at offset 0xc0141b9c) and 'cpu_up' WARNING: vmlinux - Section mismatch: reference to .init.text:__cpu_up from .text between '_cpu_up' (at offset 0xc0141bd8) and 'cpu_up' WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between '_cpu_up' (at offset 0xc0141c05) and 'cpu_up' WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between '_cpu_up' (at offset 0xc0141c26) and 'cpu_up' WARNING: vmlinux - Section mismatch: reference to .init.data: from .text between '_cpu_up' (at offset 0xc0141c37) and 'cpu_up'
This is because cpu_up, _cpu_up and __cpu_up (in some architectures) are defined as __devinit AND __cpu_up calls some __cpuinit functions.
Since __cpuinit would map to __init with this kind of a configuration, we get a .text refering .init.data warning.
This patch solves the problem by converting all of __cpu_up, _cpu_up and cpu_up from __devinit to __cpuinit. The approach is justified since the callers of cpu_up are either dependent on CONFIG_HOTPLUG_CPU or are of __init type.
Thus when CONFIG_HOTPLUG_CPU=y, all these cpu up functions would land up in .text section, and when CONFIG_HOTPLUG_CPU=n, all these functions would land up in .init section.
Tested on a i386 SMP machine running linux-2.6.20-rc3-mm1.
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> -- arch/cris/arch-v32/kernel/smp.c | 2 +- arch/m32r/kernel/smpboot.c | 2 +- arch/mips/kernel/smp.c | 2 +- arch/parisc/kernel/smp.c | 2 +- arch/powerpc/kernel/smp.c | 2 +- arch/sparc64/kernel/smp.c | 2 +- kernel/cpu.c | 4 ++-- 7 files changed, 8 insertions(+), 8 deletions(-)
Index: linux-2.6.20-rc3/kernel/cpu.c =================================================================== --- linux-2.6.20-rc3.orig/kernel/cpu.c +++ linux-2.6.20-rc3/kernel/cpu.c @@ -210,7 +210,7 @@ int cpu_down(unsigned int cpu) #endif /*CONFIG_HOTPLUG_CPU*/
/* Requires cpu_add_remove_lock to be held */ -static int __devinit _cpu_up(unsigned int cpu) +static int __cpuinit _cpu_up(unsigned int cpu) { int ret, nr_calls = 0; void *hcpu = (void *)(long)cpu; @@ -248,7 +248,7 @@ out_notify: return ret; }
-int __devinit cpu_up(unsigned int cpu) +int __cpuinit cpu_up(unsigned int cpu) { int err = 0;
Index: linux-2.6.20-rc3/arch/cris/arch-v32/kernel/smp.c =================================================================== --- linux-2.6.20-rc3.orig/arch/cris/arch-v32/kernel/smp.c +++ linux-2.6.20-rc3/arch/cris/arch-v32/kernel/smp.c @@ -195,7 +195,7 @@ int setup_profiling_timer(unsigned int m */ unsigned long cache_decay_ticks = 1;
-int __devinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu) { smp_boot_one_cpu(cpu); return cpu_online(cpu) ? 0 : -ENOSYS; Index: linux-2.6.20-rc3/arch/powerpc/kernel/smp.c =================================================================== --- linux-2.6.20-rc3.orig/arch/powerpc/kernel/smp.c +++ linux-2.6.20-rc3/arch/powerpc/kernel/smp.c @@ -468,7 +468,7 @@ static int __devinit cpu_enable(unsigned return -ENOSYS; }
-int __devinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu) { int c;
Index: linux-2.6.20-rc3/arch/m32r/kernel/smpboot.c =================================================================== --- linux-2.6.20-rc3.orig/arch/m32r/kernel/smpboot.c +++ linux-2.6.20-rc3/arch/m32r/kernel/smpboot.c @@ -351,7 +351,7 @@ static void __init do_boot_cpu(int phys_ } }
-int __devinit __cpu_up(unsigned int cpu_id) +int __cpuinit __cpu_up(unsigned int cpu_id) { int timeout;
Index: linux-2.6.20-rc3/arch/mips/kernel/smp.c =================================================================== --- linux-2.6.20-rc3.orig/arch/mips/kernel/smp.c +++ linux-2.6.20-rc3/arch/mips/kernel/smp.c @@ -271,7 +271,7 @@ void __devinit smp_prepare_boot_cpu(void * and keep control until "cpu_online(cpu)" is set. Note: cpu is * physical, not logical. */ -int __devinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu) { struct task_struct *idle;
Index: linux-2.6.20-rc3/arch/parisc/kernel/smp.c =================================================================== --- linux-2.6.20-rc3.orig/arch/parisc/kernel/smp.c +++ linux-2.6.20-rc3/arch/parisc/kernel/smp.c @@ -608,7 +608,7 @@ void smp_cpus_done(unsigned int cpu_max) }
-int __devinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu) { if (cpu != 0 && cpu < parisc_max_cpus) smp_boot_one_cpu(cpu); Index: linux-2.6.20-rc3/arch/sparc64/kernel/smp.c =================================================================== --- linux-2.6.20-rc3.orig/arch/sparc64/kernel/smp.c +++ linux-2.6.20-rc3/arch/sparc64/kernel/smp.c @@ -1388,7 +1388,7 @@ void __devinit smp_prepare_boot_cpu(void { }
-int __devinit __cpu_up(unsigned int cpu) +int __cpuinit __cpu_up(unsigned int cpu) { int ret = smp_boot_one_cpu(cpu);
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