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kbuild: simplify access to the kernel's version

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Instead of storing the version in a single integer and having various
kernel (and userspace) code how it's constructed, export individual
(major, patchlevel, sublevel) components and simplify kernel code that
uses it.

This should also make it easier on userspace.

Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Sasha Levin 2021-02-12 11:29:24 -05:00 committed by Masahiro Yamada
parent 9b82f13e7e
commit 88a686728b
6 changed files with 13 additions and 10 deletions
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5
Makefile
View File

@ -1255,7 +1255,10 @@ define filechk_version.h
expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
fi; \
echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
((c) > 255 ? 255 : (c)))'
((c) > 255 ? 255 : (c)))'; \
echo \#define LINUX_VERSION_MAJOR $(VERSION); \
echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
endef
$(version_h): FORCE

4
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@ -235,8 +235,8 @@ static void mlx5_set_driver_version(struct mlx5_core_dev *dev)
remaining_size = max_t(int, 0, driver_ver_sz - strlen(string));
snprintf(string + strlen(string), remaining_size, "%u.%u.%u",
(u8)((LINUX_VERSION_CODE >> 16) & 0xff), (u8)((LINUX_VERSION_CODE >> 8) & 0xff),
(u16)(LINUX_VERSION_CODE & 0xffff));
LINUX_VERSION_MAJOR, LINUX_VERSION_PATCHLEVEL,
LINUX_VERSION_SUBLEVEL);
/*Send the command*/
MLX5_SET(set_driver_version_in, in, opcode,

4
drivers/usb/core/hcd.c
View File

@ -111,8 +111,8 @@ DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue);
*/
/*-------------------------------------------------------------------------*/
#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff))
#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff))
#define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR)
#define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL)
/* usb 3.1 root hub device descriptor */
static const u8 usb31_rh_dev_descriptor[18] = {

4
drivers/usb/gadget/udc/aspeed-vhub/hub.c
View File

@ -46,8 +46,8 @@
* - Make vid/did overridable
* - make it look like usb1 if usb1 mode forced
*/
#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff))
#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff))
#define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR)
#define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL)
enum {
AST_VHUB_STR_INDEX_MAX = 4,

4
include/linux/usb/composite.h
View File

@ -573,8 +573,8 @@ static inline u16 get_default_bcdDevice(void)
{
u16 bcdDevice;
bcdDevice = bin2bcd((LINUX_VERSION_CODE >> 16 & 0xff)) << 8;
bcdDevice |= bin2bcd((LINUX_VERSION_CODE >> 8 & 0xff));
bcdDevice = bin2bcd(LINUX_VERSION_MAJOR) << 8;
bcdDevice |= bin2bcd(LINUX_VERSION_PATCHLEVEL);
return bcdDevice;
}

2
kernel/sys.c
View File

@ -1243,7 +1243,7 @@ static int override_release(char __user *release, size_t len)
break;
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 60;
v = LINUX_VERSION_PATCHLEVEL + 60;
copy = clamp_t(size_t, len, 1, sizeof(buf));
copy = scnprintf(buf, copy, "2.6.%u%s", v, rest);
ret = copy_to_user(release, buf, copy + 1);