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parisc: Remap hugepage-aligned pages in set_kernel_text_rw() 

The alternative coding patch for parisc in kernel 4.20 broke booting
machines with PA8500-PA8700 CPUs. The problem is, that for such machines
the parisc kernel automatically utilizes huge pages to access kernel
text code, but the set_kernel_text_rw() function, which is used shortly
before applying any alternative patches, didn't used the correctly
hugepage-aligned addresses to remap the kernel text read-writeable.

Fixes: 3847dab774 ("parisc: Add alternative coding infrastructure")
Cc: <stable@vger.kernel.org>	[4.20]
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2019-01-04 23:32:53 +01:00
parent 0b2c8f8b6b
commit dfbaecb2b7
1 changed files with 2 additions and 2 deletions
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4
arch/parisc/mm/init.c
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@ -512,8 +512,8 @@ static void __init map_pages(unsigned long start_vaddr,
void __init set_kernel_text_rw(int enable_read_write)
{
unsigned long start = (unsigned long)__init_begin;
unsigned long end = (unsigned long)_etext;
unsigned long start = (unsigned long) _text;
unsigned long end = (unsigned long) &data_start;
map_pages(start, __pa(start), end-start,
PAGE_KERNEL_RWX, enable_read_write ? 1:0);