x86/boot/compressed/64: Check return value of kernel_ident_mapping_init() (4b3fdca6) · Commits · 戴 / test

The function can fail to create an identity mapping, check for that and bail out if it happens. Signed-off-by:

arch/x86/boot/compressed/ident_map_64.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -91,6 +91,8 @@ static struct x86_mapping_info mapping_info;
		*/
		static void add_identity_map(unsigned long start, unsigned long end)
		{
		int ret;

		/* Align boundary to 2M. */
		start = round_down(start, PMD_SIZE);
		end = round_up(end, PMD_SIZE);
		@@ -98,8 +100,9 @@ static void add_identity_map(unsigned long start, unsigned long end)
		return;

		/* Build the mapping. */
		kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt,
		start, end);
		ret = kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt, start, end);
		if (ret)
		error("Error: kernel_ident_mapping_init() failed\n");
		}

		/* Locates and clears a region for a new top level page table. */