On Tue, 25 Aug 2015, yalin wang wrote: > This patch change some function and the related data to init section, > they are only called by free_initmem(), can be freed safely after > boot up.
The magic keyword here is __init_refok. > Signed-off-by: yalin wang <[email protected]> Acked-by: Nicolas Pitre <[email protected]> > --- > arch/arm/mm/init.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c > index 8a63b4c..7b505de 100644 > --- a/arch/arm/mm/init.c > +++ b/arch/arm/mm/init.c > @@ -577,7 +577,7 @@ struct section_perm { > pmdval_t clear; > }; > > -static struct section_perm nx_perms[] = { > +static struct section_perm nx_perms[] __initdata = { > /* Make pages tables, etc before _stext RW (set NX). */ > { > .start = PAGE_OFFSET, > @@ -680,7 +680,7 @@ static inline bool arch_has_strict_perms(void) > } \ > } > > -static inline void fix_kernmem_perms(void) > +static void __init fix_kernmem_perms(void) > { > set_section_perms(nx_perms, prot); > } > @@ -706,7 +706,7 @@ void set_kernel_text_ro(void) > static inline void fix_kernmem_perms(void) { } > #endif /* CONFIG_ARM_KERNMEM_PERMS */ > > -void free_tcmmem(void) > +static void __init free_tcmmem(void) > { > #ifdef CONFIG_HAVE_TCM > extern char __tcm_start, __tcm_end; > @@ -716,7 +716,7 @@ void free_tcmmem(void) > #endif > } > > -void free_initmem(void) > +void __init_refok free_initmem(void) > { > fix_kernmem_perms(); > free_tcmmem(); > @@ -728,9 +728,9 @@ void free_initmem(void) > > #ifdef CONFIG_BLK_DEV_INITRD > > -static int keep_initrd; > +static int keep_initrd __initdata; > > -void free_initrd_mem(unsigned long start, unsigned long end) > +void __init free_initrd_mem(unsigned long start, unsigned long end) > { > if (!keep_initrd) { > if (start == initrd_start) > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
