kmemcheck: rip it out

Fix up makefiles, remove references, and git rm kmemcheck.

Link: http://lkml.kernel.org/r/20171007030159.22241-4-alexander.levin@verizon.com
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vegard Nossum <vegardno@ifi.uio.no>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Tim Hansen <devtimhansen@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 173 deletions

diff --git a/arch/x86/mm/kmemcheck/shadow.c b/arch/x86/mm/kmemcheck/shadow.c
deleted file mode 100644
index c2638a7d2c10..000000000000
--- a/arch/x86/mm/kmemcheck/shadow.c
+++ /dev/null
@@ -1,173 +0,0 @@
-#include <linux/kmemcheck.h>
-#include <linux/export.h>
-#include <linux/mm.h>
-
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-#include "pte.h"
-#include "shadow.h"
-
-/*
- * Return the shadow address for the given address. Returns NULL if the
- * address is not tracked.
- *
- * We need to be extremely careful not to follow any invalid pointers,
- * because this function can be called for *any* possible address.
- */
-void *kmemcheck_shadow_lookup(unsigned long address)
-{
-	pte_t *pte;
-	struct page *page;
-
-	if (!virt_addr_valid(address))
-		return NULL;
-
-	pte = kmemcheck_pte_lookup(address);
-	if (!pte)
-		return NULL;
-
-	page = virt_to_page(address);
-	if (!page->shadow)
-		return NULL;
-	return page->shadow + (address & (PAGE_SIZE - 1));
-}
-
-static void mark_shadow(void *address, unsigned int n,
-	enum kmemcheck_shadow status)
-{
-	unsigned long addr = (unsigned long) address;
-	unsigned long last_addr = addr + n - 1;
-	unsigned long page = addr & PAGE_MASK;
-	unsigned long last_page = last_addr & PAGE_MASK;
-	unsigned int first_n;
-	void *shadow;
-
-	/* If the memory range crosses a page boundary, stop there. */
-	if (page == last_page)
-		first_n = n;
-	else
-		first_n = page + PAGE_SIZE - addr;
-
-	shadow = kmemcheck_shadow_lookup(addr);
-	if (shadow)
-		memset(shadow, status, first_n);
-
-	addr += first_n;
-	n -= first_n;
-
-	/* Do full-page memset()s. */
-	while (n >= PAGE_SIZE) {
-		shadow = kmemcheck_shadow_lookup(addr);
-		if (shadow)
-			memset(shadow, status, PAGE_SIZE);
-
-		addr += PAGE_SIZE;
-		n -= PAGE_SIZE;
-	}
-
-	/* Do the remaining page, if any. */
-	if (n > 0) {
-		shadow = kmemcheck_shadow_lookup(addr);
-		if (shadow)
-			memset(shadow, status, n);
-	}
-}
-
-void kmemcheck_mark_unallocated(void *address, unsigned int n)
-{
-	mark_shadow(address, n, KMEMCHECK_SHADOW_UNALLOCATED);
-}
-
-void kmemcheck_mark_uninitialized(void *address, unsigned int n)
-{
-	mark_shadow(address, n, KMEMCHECK_SHADOW_UNINITIALIZED);
-}
-
-/*
- * Fill the shadow memory of the given address such that the memory at that
- * address is marked as being initialized.
- */
-void kmemcheck_mark_initialized(void *address, unsigned int n)
-{
-	mark_shadow(address, n, KMEMCHECK_SHADOW_INITIALIZED);
-}
-EXPORT_SYMBOL_GPL(kmemcheck_mark_initialized);
-
-void kmemcheck_mark_freed(void *address, unsigned int n)
-{
-	mark_shadow(address, n, KMEMCHECK_SHADOW_FREED);
-}
-
-void kmemcheck_mark_unallocated_pages(struct page *p, unsigned int n)
-{
-	unsigned int i;
-
-	for (i = 0; i < n; ++i)
-		kmemcheck_mark_unallocated(page_address(&p[i]), PAGE_SIZE);
-}
-
-void kmemcheck_mark_uninitialized_pages(struct page *p, unsigned int n)
-{
-	unsigned int i;
-
-	for (i = 0; i < n; ++i)
-		kmemcheck_mark_uninitialized(page_address(&p[i]), PAGE_SIZE);
-}
-
-void kmemcheck_mark_initialized_pages(struct page *p, unsigned int n)
-{
-	unsigned int i;
-
-	for (i = 0; i < n; ++i)
-		kmemcheck_mark_initialized(page_address(&p[i]), PAGE_SIZE);
-}
-
-enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size)
-{
-#ifdef CONFIG_KMEMCHECK_PARTIAL_OK
-	uint8_t *x;
-	unsigned int i;
-
-	x = shadow;
-
-	/*
-	 * Make sure _some_ bytes are initialized. Gcc frequently generates
-	 * code to access neighboring bytes.
-	 */
-	for (i = 0; i < size; ++i) {
-		if (x[i] == KMEMCHECK_SHADOW_INITIALIZED)
-			return x[i];
-	}
-
-	return x[0];
-#else
-	return kmemcheck_shadow_test_all(shadow, size);
-#endif
-}
-
-enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow, unsigned int size)
-{
-	uint8_t *x;
-	unsigned int i;
-
-	x = shadow;
-
-	/* All bytes must be initialized. */
-	for (i = 0; i < size; ++i) {
-		if (x[i] != KMEMCHECK_SHADOW_INITIALIZED)
-			return x[i];
-	}
-
-	return x[0];
-}
-
-void kmemcheck_shadow_set(void *shadow, unsigned int size)
-{
-	uint8_t *x;
-	unsigned int i;
-
-	x = shadow;
-	for (i = 0; i < size; ++i)
-		x[i] = KMEMCHECK_SHADOW_INITIALIZED;
-}