| From | Ben Hutchings <> | Date | Tue, 17 Feb 2015 01:46:53 +0000 | Subject | [PATCH 3.2 137/152] Revert "x86, 64bit, mm: Mark data/bss/brk to nx" |
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3.2.67-rc1 review patch. If anyone has any objections, please let me know.
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From: Ben Hutchings <ben@decadent.org.uk>
This reverts commit e105c8187b7101e8a8a54ac0218c9d9c9463c636 which was commit 72212675d1c96f5db8ec6fb35701879911193158 upstream.
This caused suspend/resume to stop working on at least some systems - specifically, the system would reboot when woken.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: Steven Rostedt <rostedt@goodmis.org> --- --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -778,7 +778,6 @@ void mark_rodata_ro(void) unsigned long text_end = PAGE_ALIGN((unsigned long) &__stop___ex_table); unsigned long rodata_end = PAGE_ALIGN((unsigned long) &__end_rodata); unsigned long data_start = (unsigned long) &_sdata; - unsigned long all_end = PFN_ALIGN(&_end); printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", (end - start) >> 10); @@ -787,10 +786,10 @@ void mark_rodata_ro(void) kernel_set_to_readonly = 1; /* - * The rodata/data/bss/brk section (but not the kernel text!) - * should also be not-executable. + * The rodata section (but not the kernel text!) should also be + * not-executable. */ - set_memory_nx(rodata_start, (all_end - rodata_start) >> PAGE_SHIFT); + set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT); rodata_test();
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