This is a note to let you know that I've just added the patch titled
minmax: don't use max() in situations that want a C constant expression
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
minmax-don-t-use-max-in-situations-that-want-a-c-constant-expression.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From [email protected] Mon Sep 22
>12:38:18 2025
From: Eliav Farber <[email protected]>
Date: Mon, 22 Sep 2025 10:32:32 +0000
Subject: minmax: don't use max() in situations that want a C constant expression
To: <[email protected]>, <[email protected]>,
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Cc: Linus Torvalds <[email protected]>, David Laight
<[email protected]>, Lorenzo Stoakes <[email protected]>
Message-ID: <[email protected]>
From: Linus Torvalds <[email protected]>
[ Upstream commit cb04e8b1d2f24c4c2c92f7b7529031fc35a16fed ]
We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.
This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.
Cc: David Laight <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Eliav Farber <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 2 +-
drivers/input/touchscreen/cyttsp4_core.c | 2 +-
drivers/irqchip/irq-sun6i-r.c | 2 +-
drivers/net/can/usb/etas_es58x/es58x_devlink.c | 2 +-
fs/btrfs/tree-checker.c | 2 +-
lib/vsprintf.c | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -708,7 +708,7 @@ static const char *smu_get_feature_name(
size_t smu_cmn_get_pp_feature_mask(struct smu_context *smu,
char *buf)
{
- int8_t sort_feature[max(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
+ int8_t sort_feature[MAX(SMU_FEATURE_COUNT, SMU_FEATURE_MAX)];
uint64_t feature_mask;
int i, feature_index;
uint32_t count = 0;
--- a/drivers/input/touchscreen/cyttsp4_core.c
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -871,7 +871,7 @@ static void cyttsp4_get_mt_touches(struc
struct cyttsp4_touch tch;
int sig;
int i, j, t = 0;
- int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+ int ids[MAX(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
for (i = 0; i < num_cur_tch; i++) {
--- a/drivers/irqchip/irq-sun6i-r.c
+++ b/drivers/irqchip/irq-sun6i-r.c
@@ -270,7 +270,7 @@ static const struct irq_domain_ops sun6i
static int sun6i_r_intc_suspend(void)
{
- u32 buf[BITS_TO_U32(max(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
+ u32 buf[BITS_TO_U32(MAX(SUN6I_NR_TOP_LEVEL_IRQS, SUN6I_NR_MUX_BITS))];
int i;
/* Wake IRQs are enabled during system sleep and shutdown. */
--- a/drivers/net/can/usb/etas_es58x/es58x_devlink.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_devlink.c
@@ -215,7 +215,7 @@ static int es58x_devlink_info_get(struct
struct es58x_sw_version *fw_ver = &es58x_dev->firmware_version;
struct es58x_sw_version *bl_ver = &es58x_dev->bootloader_version;
struct es58x_hw_revision *hw_rev = &es58x_dev->hardware_revision;
- char buf[max(sizeof("xx.xx.xx"), sizeof("axxx/xxx"))];
+ char buf[MAX(sizeof("xx.xx.xx"), sizeof("axxx/xxx"))];
int ret = 0;
if (es58x_sw_version_is_valid(fw_ver)) {
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -614,7 +614,7 @@ static int check_dir_item(struct extent_
*/
if (key->type == BTRFS_DIR_ITEM_KEY ||
key->type == BTRFS_XATTR_ITEM_KEY) {
- char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+ char namebuf[MAX(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
read_extent_buffer(leaf, namebuf,
(unsigned long)(di + 1), name_len);
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1079,7 +1079,7 @@ char *resource_string(char *buf, char *e
#define FLAG_BUF_SIZE (2 * sizeof(res->flags))
#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]")
#define RAW_BUF_SIZE sizeof("[mem - flags 0x]")
- char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+ char sym[MAX(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
char *p = sym, *pend = sym + sizeof(sym);
Patches currently in stable-queue which might be from [email protected] are
queue-6.6/minmax-don-t-use-max-in-situations-that-want-a-c-constant-expression.patch
queue-6.6/minmax-make-generic-min-and-max-macros-available-everywhere.patch
queue-6.6/minmax-fix-up-min3-and-max3-too.patch
queue-6.6/minmax-add-a-few-more-min_t-max_t-users.patch
queue-6.6/minmax-improve-macro-expansion-and-type-checking.patch
queue-6.6/minmax-avoid-overly-complicated-constant-expressions-in-vm-code.patch
queue-6.6/minmax-simplify-min-max-clamp-implementation.patch
queue-6.6/minmax-simplify-and-clarify-min_t-max_t-implementation.patch
