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authorDave Airlie <airlied@gmail.com>2011-01-25 08:41:58 +1000
committerDave Airlie <airlied@gmail.com>2011-01-25 08:41:58 +1000
commitabb72c828878a2c69b2cfb33ac30007c8ecd735e (patch)
treea95ace4f34d86d55b3307bd53354d335e9f23563 /include
parent58bbf018a70c562437eeae121a5d021ba7fe56a5 (diff)
parent8e934dbf264418afe4d1dff34ce074ecc14280db (diff)
downloadlinux-abb72c828878a2c69b2cfb33ac30007c8ecd735e.tar.bz2
Merge branch 'drm-intel-fixes-2' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel into drm-fixes
* 'drm-intel-fixes-2' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel: (30 commits) drm/i915: Prevent uninitialised reads during error state capture drm/i915: Use consistent mappings for OpRegion between ACPI and i915 drm/i915: Handle the no-interrupts case for UMS by polling drm/i915: Disable high-precision vblank timestamping for UMS drm/i915: Increase the amount of defense before computing vblank timestamps drm/i915,agp/intel: Do not clear stolen entries Remove MAYBE_BUILD_BUG_ON BUILD_BUG_ON: make it handle more cases module: fix missing semicolons in MODULE macro usage param: add null statement to compiled-in module params module: fix linker error for MODULE_VERSION when !MODULE and CONFIG_SYSFS=n module: show version information for built-in modules in sysfs selinux: return -ENOMEM when memory allocation fails tpm: fix panic caused by "tpm: Autodetect itpm devices" TPM: Long default timeout fix trusted keys: Fix a memory leak in trusted_update(). keys: add trusted and encrypted maintainers encrypted-keys: rename encrypted_defined files to encrypted trusted-keys: rename trusted_defined files to trusted drm/i915: Recognise non-VGA display devices ...
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h7
-rw-r--r--include/linux/gfp.h2
-rw-r--r--include/linux/kernel.h32
-rw-r--r--include/linux/kmemcheck.h2
-rw-r--r--include/linux/module.h27
-rw-r--r--include/linux/moduleparam.h6
-rw-r--r--include/linux/virtio_config.h5
7 files changed, 70 insertions, 11 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 68649336c4ad..6ebb81030d2d 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -364,6 +364,13 @@
VMLINUX_SYMBOL(__start___param) = .; \
*(__param) \
VMLINUX_SYMBOL(__stop___param) = .; \
+ } \
+ \
+ /* Built-in module versions. */ \
+ __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___modver) = .; \
+ *(__modver) \
+ VMLINUX_SYMBOL(__stop___modver) = .; \
. = ALIGN((align)); \
VMLINUX_SYMBOL(__end_rodata) = .; \
} \
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index a3b148a91874..0b84c61607e8 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -249,7 +249,7 @@ static inline enum zone_type gfp_zone(gfp_t flags)
((1 << ZONES_SHIFT) - 1);
if (__builtin_constant_p(bit))
- MAYBE_BUILD_BUG_ON((GFP_ZONE_BAD >> bit) & 1);
+ BUILD_BUG_ON((GFP_ZONE_BAD >> bit) & 1);
else {
#ifdef CONFIG_DEBUG_VM
BUG_ON((GFP_ZONE_BAD >> bit) & 1);
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d07d8057e440..e2f4d6af2125 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -575,12 +575,6 @@ struct sysinfo {
char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
};
-/* Force a compilation error if condition is true */
-#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
-
-/* Force a compilation error if condition is constant and true */
-#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
-
/* Force a compilation error if a constant expression is not a power of 2 */
#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \
BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
@@ -592,6 +586,32 @@ struct sysinfo {
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
+/**
+ * BUILD_BUG_ON - break compile if a condition is true.
+ * @cond: the condition which the compiler should know is false.
+ *
+ * If you have some code which relies on certain constants being equal, or
+ * other compile-time-evaluated condition, you should use BUILD_BUG_ON to
+ * detect if someone changes it.
+ *
+ * The implementation uses gcc's reluctance to create a negative array, but
+ * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments
+ * to inline functions). So as a fallback we use the optimizer; if it can't
+ * prove the condition is false, it will cause a link error on the undefined
+ * "__build_bug_on_failed". This error message can be harder to track down
+ * though, hence the two different methods.
+ */
+#ifndef __OPTIMIZE__
+#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
+#else
+extern int __build_bug_on_failed;
+#define BUILD_BUG_ON(condition) \
+ do { \
+ ((void)sizeof(char[1 - 2*!!(condition)])); \
+ if (condition) __build_bug_on_failed = 1; \
+ } while(0)
+#endif
+
/* Trap pasters of __FUNCTION__ at compile-time */
#define __FUNCTION__ (__func__)
diff --git a/include/linux/kmemcheck.h b/include/linux/kmemcheck.h
index 08d7dc4ddf40..39f8453239f7 100644
--- a/include/linux/kmemcheck.h
+++ b/include/linux/kmemcheck.h
@@ -76,7 +76,7 @@ bool kmemcheck_is_obj_initialized(unsigned long addr, size_t size);
\
_n = (long) &((ptr)->name##_end) \
- (long) &((ptr)->name##_begin); \
- MAYBE_BUILD_BUG_ON(_n < 0); \
+ BUILD_BUG_ON(_n < 0); \
\
kmemcheck_mark_initialized(&((ptr)->name##_begin), _n); \
} while (0)
diff --git a/include/linux/module.h b/include/linux/module.h
index 8b17fd8c790d..e7c6385c6683 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -58,6 +58,12 @@ struct module_attribute {
void (*free)(struct module *);
};
+struct module_version_attribute {
+ struct module_attribute mattr;
+ const char *module_name;
+ const char *version;
+};
+
struct module_kobject
{
struct kobject kobj;
@@ -161,7 +167,28 @@ extern struct module __this_module;
Using this automatically adds a checksum of the .c files and the
local headers in "srcversion".
*/
+
+#if defined(MODULE) || !defined(CONFIG_SYSFS)
#define MODULE_VERSION(_version) MODULE_INFO(version, _version)
+#else
+#define MODULE_VERSION(_version) \
+ extern ssize_t __modver_version_show(struct module_attribute *, \
+ struct module *, char *); \
+ static struct module_version_attribute __modver_version_attr \
+ __used \
+ __attribute__ ((__section__ ("__modver"),aligned(sizeof(void *)))) \
+ = { \
+ .mattr = { \
+ .attr = { \
+ .name = "version", \
+ .mode = S_IRUGO, \
+ }, \
+ .show = __modver_version_show, \
+ }, \
+ .module_name = KBUILD_MODNAME, \
+ .version = _version, \
+ }
+#endif
/* Optional firmware file (or files) needed by the module
* format is simply firmware file name. Multiple firmware
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 112adf8bd47d..07b41951e3fa 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -16,15 +16,17 @@
/* Chosen so that structs with an unsigned long line up. */
#define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
-#ifdef MODULE
#define ___module_cat(a,b) __mod_ ## a ## b
#define __module_cat(a,b) ___module_cat(a,b)
+#ifdef MODULE
#define __MODULE_INFO(tag, name, info) \
static const char __module_cat(name,__LINE__)[] \
__used __attribute__((section(".modinfo"), unused, aligned(1))) \
= __stringify(tag) "=" info
#else /* !MODULE */
-#define __MODULE_INFO(tag, name, info)
+/* This struct is here for syntactic coherency, it is not used */
+#define __MODULE_INFO(tag, name, info) \
+ struct __module_cat(name,__LINE__) {}
#endif
#define __MODULE_PARM_TYPE(name, _type) \
__MODULE_INFO(parmtype, name##type, #name ":" _type)
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 0093dd7c1d6f..800617b4ddd5 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -109,7 +109,10 @@ static inline bool virtio_has_feature(const struct virtio_device *vdev,
unsigned int fbit)
{
/* Did you forget to fix assumptions on max features? */
- MAYBE_BUILD_BUG_ON(fbit >= 32);
+ if (__builtin_constant_p(fbit))
+ BUILD_BUG_ON(fbit >= 32);
+ else
+ BUG_ON(fbit >= 32);
if (fbit < VIRTIO_TRANSPORT_F_START)
virtio_check_driver_offered_feature(vdev, fbit);