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| author | Muralidhara M K <muralimk@amd.com> | 2022-03-24 17:57:29 +0530 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-05 19:22:27 +0200 |
| commit | e1907d37514b8564ba18b4a768a35beee71cb011 (patch) | |
| tree | d0298969c1cec749a0c601efb89e2fdc158284f6 /drivers/char/agp | |
| parent | 3123109284176b1532874591f7c81f3837bbdc17 (diff) | |
| download | lwn-e1907d37514b8564ba18b4a768a35beee71cb011.tar.gz lwn-e1907d37514b8564ba18b4a768a35beee71cb011.zip | |
x86/amd_nb: Unexport amd_cache_northbridges()
amd_cache_northbridges() is exported by amd_nb.c and is called by
amd64-agp.c and amd64_edac.c modules at module_init() time so that NB
descriptors are properly cached before those drivers can use them.
However, the init_amd_nbs() initcall already does call
amd_cache_northbridges() unconditionally and thus makes sure the NB
descriptors are enumerated.
That initcall is a fs_initcall type which is on the 5th group (starting
from 0) of initcalls that gets run in increasing numerical order by the
init code.
The module_init() call is turned into an __initcall() in the MODULE=n
case and those are device-level initcalls, i.e., group 6.
Therefore, the northbridges caching is already finished by the time
module initialization starts and thus the correct initialization order
is retained.
Unexport amd_cache_northbridges(), update dependent modules to
call amd_nb_num() instead. While at it, simplify the checks in
amd_cache_northbridges().
[ bp: Heavily massage and *actually* explain why the change is ok. ]
Signed-off-by: Muralidhara M K <muralimk@amd.com>
Signed-off-by: Naveen Krishna Chatradhi <nchatrad@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220324122729.221765-1-nchatrad@amd.com
Diffstat (limited to 'drivers/char/agp')
| -rw-r--r-- | drivers/char/agp/amd64-agp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c index dc78a4fb879e..84a4aa9312cf 100644 --- a/drivers/char/agp/amd64-agp.c +++ b/drivers/char/agp/amd64-agp.c @@ -327,7 +327,7 @@ static int cache_nbs(struct pci_dev *pdev, u32 cap_ptr) { int i; - if (amd_cache_northbridges() < 0) + if (!amd_nb_num()) return -ENODEV; if (!amd_nb_has_feature(AMD_NB_GART)) |