[PATCH 3/3] page-flags: hide PF_* validation check under separate config option

VM_BUG_ONs in PF_NO_TAIL() and PF_NO_COMPOUND() add 4+ KiB to mm/build-in.o for DEBUG_VM kernel. Let's hide them under new config option -- CONFIG_DEBUG_VM_PGFLAGS. With the option enabled VM_BUG_ON_PGFLAGS() is equal to VM_BUG_ON_PAGE. Signed-off-by: Kirill A. Shutemov ---

[PATCH 3/3] page-flags: hide PF_* validation check under separate config option

VM_BUG_ONs in PF_NO_TAIL() and PF_NO_COMPOUND() add 4+ KiB to mm/build-in.o for DEBUG_VM kernel. Let's hide them under new config option -- CONFIG_DEBUG_VM_PGFLAGS. With the option enabled VM_BUG_ON_PGFLAGS() is equal to VM_BUG_ON_PAGE. Signed-off-by: Kirill A. Shutemov