diff options
| -rw-r--r-- | arch/powerpc/kernel/vdso.c | 34 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 3 | ||||
| -rw-r--r-- | include/asm-powerpc/vdso.h | 5 |
3 files changed, 23 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index 50149ec6efa4..e46c31b36641 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -49,24 +49,23 @@ /* Max supported size for symbol names */ #define MAX_SYMNAME 64 -#define VDSO32_MAXPAGES (((0x3000 + PAGE_MASK) >> PAGE_SHIFT) + 2) -#define VDSO64_MAXPAGES (((0x3000 + PAGE_MASK) >> PAGE_SHIFT) + 2) - extern char vdso32_start, vdso32_end; static void *vdso32_kbase = &vdso32_start; -unsigned int vdso32_pages; -static struct page *vdso32_pagelist[VDSO32_MAXPAGES]; +static unsigned int vdso32_pages; +static struct page **vdso32_pagelist; unsigned long vdso32_sigtramp; unsigned long vdso32_rt_sigtramp; #ifdef CONFIG_PPC64 extern char vdso64_start, vdso64_end; static void *vdso64_kbase = &vdso64_start; -unsigned int vdso64_pages; -static struct page *vdso64_pagelist[VDSO64_MAXPAGES]; +static unsigned int vdso64_pages; +static struct page **vdso64_pagelist; unsigned long vdso64_rt_sigtramp; #endif /* CONFIG_PPC64 */ +static int vdso_ready; + /* * The vdso data page (aka. systemcfg for old ppc64 fans) is here. * Once the early boot kernel code no longer needs to muck around @@ -182,6 +181,9 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, unsigned long vdso_base; int rc; + if (!vdso_ready) + return 0; + #ifdef CONFIG_PPC64 if (test_thread_flag(TIF_32BIT)) { vdso_pagelist = vdso32_pagelist; @@ -661,7 +663,7 @@ static void __init vdso_setup_syscall_map(void) } -void __init vdso_init(void) +static int __init vdso_init(void) { int i; @@ -716,11 +718,13 @@ void __init vdso_init(void) #ifdef CONFIG_PPC64 vdso64_pages = 0; #endif - return; + return 0; } /* Make sure pages are in the correct state */ - BUG_ON(vdso32_pages + 2 > VDSO32_MAXPAGES); + vdso32_pagelist = kzalloc(sizeof(struct page *) * (vdso32_pages + 2), + GFP_KERNEL); + BUG_ON(vdso32_pagelist == NULL); for (i = 0; i < vdso32_pages; i++) { struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE); ClearPageReserved(pg); @@ -731,7 +735,9 @@ void __init vdso_init(void) vdso32_pagelist[i] = NULL; #ifdef CONFIG_PPC64 - BUG_ON(vdso64_pages + 2 > VDSO64_MAXPAGES); + vdso64_pagelist = kzalloc(sizeof(struct page *) * (vdso64_pages + 2), + GFP_KERNEL); + BUG_ON(vdso64_pagelist == NULL); for (i = 0; i < vdso64_pages; i++) { struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE); ClearPageReserved(pg); @@ -743,7 +749,13 @@ void __init vdso_init(void) #endif /* CONFIG_PPC64 */ get_page(virt_to_page(vdso_data)); + + smp_wmb(); + vdso_ready = 1; + + return 0; } +arch_initcall(vdso_init); int in_gate_area_no_task(unsigned long addr) { diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 77b4637097e9..52f397c108a7 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -384,9 +384,6 @@ void __init mem_init(void) initsize >> 10); mem_init_done = 1; - - /* Initialize the vDSO */ - vdso_init(); } /* diff --git a/include/asm-powerpc/vdso.h b/include/asm-powerpc/vdso.h index b9f9118b1607..26fc449bd989 100644 --- a/include/asm-powerpc/vdso.h +++ b/include/asm-powerpc/vdso.h @@ -18,16 +18,11 @@ #ifndef __ASSEMBLY__ -extern unsigned int vdso64_pages; -extern unsigned int vdso32_pages; - /* Offsets relative to thread->vdso_base */ extern unsigned long vdso64_rt_sigtramp; extern unsigned long vdso32_sigtramp; extern unsigned long vdso32_rt_sigtramp; -extern void vdso_init(void); - #else /* __ASSEMBLY__ */ #ifdef __VDSO64__ |