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Subject[PATCH 2/4] x86/pat: Merge pat_init_cache_modes() into its caller
Date
From: Borislav Petkov <bp@suse.de>

This way we can pass pat MSR value directly.

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: arnd@arndb.de
Cc: Elliott@hp.com
Cc: hch@lst.de
Cc: hmh@hmh.eng.br
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: jgross@suse.com
Cc: konrad.wilk@oracle.com
Cc: linux-mm <linux-mm@kvack.org>
Cc: linux-nvdimm@lists.01.org
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: stefan.bader@canonical.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: x86-ml <x86@kernel.org>
Cc: yigal@plexistor.com
---
arch/x86/mm/pat.c | 39 ++++++++++++++++-----------------------
1 file changed, 16 insertions(+), 23 deletions(-)

diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 476d0780560f..4d28759f5a1a 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -172,32 +172,14 @@ static enum page_cache_mode pat_get_cache_mode(unsigned pat_val, char *msg)

#undef CM

-/*
- * Update the cache mode to pgprot translation tables according to PAT
- * configuration.
- * Using lower indices is preferred, so we start with highest index.
- */
-void pat_init_cache_modes(void)
-{
- int i;
- enum page_cache_mode cache;
- char pat_msg[33];
- u64 pat;
-
- rdmsrl(MSR_IA32_CR_PAT, pat);
- pat_msg[32] = 0;
- for (i = 7; i >= 0; i--) {
- cache = pat_get_cache_mode((pat >> (i * 8)) & 7,
- pat_msg + 4 * i);
- update_cache_mode_entry(i, cache);
- }
- pr_info("x86/PAT: Configuration [0-7]: %s\n", pat_msg);
-}
-
#define PAT(x, y) ((u64)PAT_ ## y << ((x)*8))

static void pat_bsp_init(u64 pat)
{
+ enum page_cache_mode cache;
+ char pat_msg[33];
+ int i;
+
if (!cpu_has_pat) {
pat_disable("PAT not supported by CPU.");
return;
@@ -211,7 +193,18 @@ static void pat_bsp_init(u64 pat)

wrmsrl(MSR_IA32_CR_PAT, pat);

- pat_init_cache_modes();
+ pat_msg[32] = 0;
+
+ /*
+ * Update the cache mode to pgprot translation tables according to PAT
+ * configuration. Using lower indices is preferred, so we start with
+ * highest index.
+ */
+ for (i = 7; i >= 0; i--) {
+ cache = pat_get_cache_mode((pat >> (i * 8)) & 7, pat_msg + 4 * i);
+ update_cache_mode_entry(i, cache);
+ }
+ pr_info("x86/PAT: Configuration [0-7]: %s\n", pat_msg);
}

static void pat_ap_init(u64 pat)
--
2.3.5


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