[PATCH 2/4] add page_wrprotect(): write protecting page.

this patch add new function called page_wrprotect(), page_wrprotect() is used to take a page and mark all the pte that point into it as readonly. The function is working by walking the rmap of the page, and setting each pte realted to the page as readonly. The odirect_sync parameter is used to

[PATCH 2/4] add page_wrprotect(): write protecting page.

this patch add new function called page_wrprotect(), page_wrprotect() is used to take a page and mark all the pte that point into it as readonly. The function is working by walking the rmap of the page, and setting each pte realted to the page as readonly. The odirect_sync parameter is used to

[PATCH 2/4] add page_wrprotect(): write protecting page.

this patch add new function called page_wrprotect(), page_wrprotect() is used to take a page and mark all the pte that point into it as readonly. The function is working by walking the rmap of the page, and setting each pte realted to the page as readonly. The odirect_sync parameter is used to