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Arnd Bergmann a27984f631 scsi: csiostor: Avoid function pointer casts [ Upstream commit `9f3dbcb563` ] csiostor uses function pointer casts to keep the csio_ln_ev state machine hidden, but this causes warnings about control flow integrity (KCFI) violations in clang-16 and higher: drivers/scsi/csiostor/csio_lnode.c:1098:33: error: cast from 'void ()(struct csio_lnode , enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void ()(void , unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1098 \| return (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)); \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1369:29: error: cast from 'void ()(struct csio_lnode , enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void ()(void , unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1369 \| if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_uninit)) { \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1373:29: error: cast from 'void ()(struct csio_lnode , enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void ()(void , unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1373 \| if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)) { \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/csiostor/csio_lnode.c:1377:29: error: cast from 'void ()(struct csio_lnode , enum csio_ln_ev)' to 'csio_sm_state_t' (aka 'void ()(void , unsigned int)') converts to incompatible function type [-Werror,-Wcast-function-type-strict] 1377 \| if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_offline)) { \| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Move the enum into a shared header so the correct types can be used without the need for casts. Fixes: `a3667aaed5` ("[SCSI] csiostor: Chelsio FCoE offload driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20240213100518.457623-1-arnd@kernel.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2024-03-26 18:21:33 -04:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.