Subject: linux-next: build failure after merge of the i2c-host tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 4 Jul 2025 12:02:07 +1000

Hi all,

After merging the i2c-host tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from <command-line>:
drivers/i2c/busses/i2c-st.c: In function 'st_i2c_rd_fill_tx_fifo':
include/linux/compiler_types.h:568:45: error: call to '__compiletime_assert_369' declared with attribute error: min(max, 0x8 - tx_fstat) signedness error
  568 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
      |                                             ^
include/linux/compiler_types.h:549:25: note: in definition of macro '__compiletime_assert'
  549 |                         prefix ## suffix();                             \
      |                         ^~~~~~
include/linux/compiler_types.h:568:9: note: in expansion of macro '_compiletime_assert'
  568 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
      |         ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
   39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
      |                                     ^~~~~~~~~~~~~~~~~~
include/linux/minmax.h:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
   93 |         BUILD_BUG_ON_MSG(!__types_ok(ux, uy),           \
      |         ^~~~~~~~~~~~~~~~
include/linux/minmax.h:98:9: note: in expansion of macro '__careful_cmp_once'
   98 |         __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
      |         ^~~~~~~~~~~~~~~~~~
include/linux/minmax.h:105:25: note: in expansion of macro '__careful_cmp'
  105 | #define min(x, y)       __careful_cmp(min, x, y)
      |                         ^~~~~~~~~~~~~
drivers/i2c/busses/i2c-st.c:453:13: note: in expansion of macro 'min'
  453 |         i = min(max, SSC_TXFIFO_SIZE - tx_fstat);
      |             ^~~

Caused by commit

  cbae4d3dd2f7 ("i2c: busses: Use min() to improve code")

I have used the i2c-host tree from next-20250703 for today.

-- 
Cheers,
Stephen Rothwell